Introduction
If you love classic stuffed peppers but want an easier dinner, this Unstuffed Bell Pepper Casserole is the perfect recipe.
It combines juicy ground beef, colorful bell peppers, onions, tomatoes, tender rice, savory seasonings, and melted cheese in one comforting casserole.
Instead of stuffing individual peppers, everything is cooked together in a convenient 13 × 9-inch baking dish.
This makes it an excellent easy family dinner, budget-friendly casserole, and weeknight comfort food recipe.
Recipe Overview
| Metric | Detail |
| Prep Time | 15 minutes |
| Cook Time | 55 minutes |
| Total Time | 1 hour 10 minutes |
| Servings | 8 servings |
| Course | Main Course |
| Cuisine | American |
| Difficulty | Easy |
Why You’ll Love This Recipe
This casserole gives you all the delicious flavors of traditional stuffed peppers without the extra work of stuffing each pepper individually.
Everything comes together in one baking dish, making preparation simple and cleanup easier.
The combination of seasoned beef, tender rice, sweet bell peppers, tomato sauce, and melted cheese creates a hearty meal that the whole family can enjoy.
It is also easy to customize with different meats, cheeses, vegetables, and seasonings.
Ingredients
Meat & Vegetables
| Ingredient | Amount |
| Ground beef | 1½ lbs |
| Green bell peppers, diced | 2 medium |
| Red bell peppers, diced | 2 medium |
| Yellow onion, chopped | 1 large |
| Garlic, minced | 3–4 cloves |
Rice & Tomato Mixture
| Ingredient | Amount |
| Long-grain white rice, uncooked | 1½ cups |
| Diced tomatoes with juices | 14.5 oz can |
| Tomato sauce | 8 oz can |
| Beef broth | 2 cups |
| Worcestershire sauce | 2 teaspoons |
Seasonings
| Ingredient | Amount |
| Italian seasoning | 1 teaspoon |
| Salt | 1 teaspoon |
| Black pepper | ½ teaspoon |
| Red pepper flakes | Pinch, optional |
Cheese Topping
| Ingredient | Amount |
| Shredded sharp cheddar | 1 cup |
| Shredded mozzarella | 1 cup |
You can also use pepper jack, Colby Jack, or your favorite melting cheese.
Step-by-Step Instructions
Prepare the Oven
Preheat your oven to 350°F (175°C).
Lightly grease a 13 × 9-inch baking dish with cooking spray or a small amount of oil.
Set the dish aside while you prepare the filling.
Brown the Beef and Vegetables
Heat a large skillet over medium-high heat.
Add the ground beef, chopped onion, green bell peppers, and red bell peppers.
Cook for approximately 7–10 minutes, breaking the beef apart with a wooden spoon as it cooks.
Continue until the beef is no longer pink and the vegetables begin to soften.
Add the Garlic and Seasonings
Add the minced garlic to the skillet.
Stir in the Italian seasoning, salt, black pepper, red pepper flakes, and Worcestershire sauce.
Cook for approximately 1 minute, stirring continuously.
The garlic should become fragrant.
If there is a large amount of excess grease, carefully drain it from the skillet.
Combine the Casserole
Transfer the cooked beef and vegetable mixture to the prepared baking dish.
Add the uncooked long-grain rice.
Pour in the diced tomatoes with their juices, tomato sauce, and beef broth.
Stir everything thoroughly.
Make sure the rice is distributed evenly throughout the dish and is mostly covered by the liquid.
Bake the Casserole
Cover the baking dish tightly with aluminum foil.
This is important because the trapped steam helps cook the rice.
Place the casserole in the preheated oven.
Bake at 350°F (175°C) for approximately 45–60 minutes.
Cooking time can vary depending on the rice, baking dish, and oven.
Check the casserole around the 45-minute mark.
The rice should be tender and most of the liquid should be absorbed.
If the rice is still firm, cover the dish again and continue baking for another 10–15 minutes.
Add the Cheese
Once the rice is tender, carefully remove the foil.
Sprinkle the shredded cheddar and mozzarella evenly over the top.
Return the uncovered casserole to the oven.
Bake for another 5–10 minutes, or until the cheese is completely melted and bubbling.
For a more golden top, you can briefly broil the casserole for 1–2 minutes, watching carefully.
Rest and Serve
Remove the casserole from the oven.
Let it rest for approximately 5–10 minutes before serving.
This allows the rice mixture to settle and makes the casserole easier to portion.
Serve warm with your favorite side dishes.
Best Tips
Use long-grain white rice for the most reliable texture.
Avoid substituting instant rice unless you adjust the liquid and cooking time according to the package instructions.
Make sure the baking dish is tightly covered with foil during the main baking stage.
This traps steam and allows the uncooked rice to absorb the broth and tomato juices.
Dice the bell peppers into relatively similar-sized pieces so they cook evenly.
If you prefer softer peppers, cut them slightly smaller.
For the best cheese topping, shred your cheese fresh before adding it to the casserole.
Freshly shredded cheese usually melts smoothly and creates a more appealing golden topping.
Always allow the casserole to rest for several minutes before serving.
Best Ingredient Options
Ground beef provides a rich, savory flavor, but ground turkey works beautifully for a lighter variation.
You can use a combination of beef and turkey if desired.
Green and red bell peppers create a nice balance of color and flavor.
Yellow, orange, or poblano peppers can also be added.
For the cheese, cheddar and mozzarella create an excellent combination of sharp flavor and creamy melt.
Pepper jack is a great option if you enjoy a little heat.
For a richer tomato flavor, you can replace part of the tomato sauce with crushed tomatoes.
Recipe Variations
Mexican-Style Bell Pepper Casserole
Replace the Italian seasoning with taco seasoning.
Add black beans, corn, and a little chopped cilantro.
Top with cheddar or Monterey Jack cheese.
Spicy Beef Version
Use pepper jack cheese and add extra red pepper flakes.
You can also add diced jalapeños to the bell pepper mixture.
Ground Turkey Casserole
Replace the ground beef with 1½ pounds of ground turkey.
Add an extra teaspoon of Worcestershire sauce or a splash of beef-style broth to enhance the savory flavor.
Vegetable Version
Replace the meat with additional vegetables such as mushrooms, zucchini, corn, and black beans.
Use vegetable broth instead of beef broth.
Cajun Bell Pepper Casserole
Replace the Italian seasoning with Cajun seasoning.
Add a little smoked paprika and cayenne pepper for a deeper, spicier flavor.
What to Serve With
This hearty casserole can easily be served as a complete meal.
A simple green salad adds freshness and balances the richness of the beef and cheese.
Steamed broccoli or roasted vegetables are also excellent side dishes.
For a more filling dinner, serve it with warm garlic bread or crusty bread.
A spoonful of sour cream, fresh parsley, or chopped green onions can also make a delicious finishing touch.
Make-Ahead Instructions
You can prepare the beef and vegetable mixture ahead of time.
Allow it to cool, then store it in an airtight container in the refrigerator.
When ready to make the casserole, combine the mixture with the rice, tomatoes, tomato sauce, and broth.
For the best rice texture, assemble the complete casserole shortly before baking rather than leaving uncooked rice sitting in the liquid overnight.
If the casserole is assembled ahead of time and refrigerated, it will be cold when it goes into the oven, so additional cooking time may be necessary.
Storage
Allow leftover casserole to cool before transferring it to an airtight container.
Store it in the refrigerator for approximately 3–4 days.
Keep the casserole properly refrigerated and avoid leaving cooked leftovers at room temperature for extended periods.
Individual portions are convenient for quick lunches and easy weeknight meals.
Reheating
For individual portions, place the casserole on a microwave-safe plate.
Cover loosely and microwave for approximately 1–2 minutes, stirring or checking halfway through.
For larger portions, reheat the casserole in a covered baking dish at 350°F (175°C) until heated through.
Adding a small splash of broth before reheating can help restore moisture if the rice has become dry.
Freezing
This casserole can be frozen after cooking.
Allow it to cool completely before transferring individual portions to freezer-safe containers.
Store for up to approximately 2–3 months for the best quality.
Thaw overnight in the refrigerator before reheating.
For best texture, add a small amount of broth or tomato sauce before reheating if the rice appears dry.
Common Mistakes to Avoid
Do not forget to cover the casserole during the main baking stage.
The rice needs steam and liquid to cook properly.
Avoid using too much rice without increasing the liquid.
Rice absorbs a significant amount of liquid as it cooks.
Do not add the cheese at the beginning.
Adding it near the end prevents it from becoming overly browned or dry before the rice is fully cooked.
Avoid cutting into the casserole immediately after removing it from the oven.
A short resting period allows the mixture to firm up.
Finally, check the rice before removing the casserole from the oven.
If it is still firm, cover the dish and continue baking until the rice is tender.
Nutrition Estimate
The following values are approximate and depend on the specific brands and ingredients used.
| Nutrient | Approx. Per Serving |
| Calories | 520–580 kcal |
| Protein | 31–36 g |
| Carbohydrates | 42–48 g |
| Fat | 25–30 g |
| Saturated Fat | 11–14 g |
| Fiber | 4–6 g |
| Sugar | 7–10 g |
| Sodium | 850–1,100 mg |
| Calcium | 250–350 mg |
Frequently Asked Questions
Can I use ground turkey instead of ground beef?
Yes.
Ground turkey is an easy substitute and works particularly well in this casserole.
Because turkey is generally leaner, you may want to add a little extra Worcestershire sauce or seasoning for additional flavor.
Can I use brown rice?
Yes, but brown rice generally requires more liquid and a longer cooking time than white rice.
For the most reliable results, follow the cooking instructions for your specific brown rice.
Why is my rice still hard?
The most common causes are insufficient liquid, an uncovered baking dish, or insufficient cooking time.
Make sure the casserole is tightly covered with foil during baking.
If the rice is still firm, add a small amount of warm broth, cover the dish again, and continue baking.
Can I make this casserole without cheese?
Yes.
The cheese is optional, although it provides the creamy, golden topping that makes this casserole especially comforting.
You can also use dairy-free shredded cheese.
Can I add more vegetables?
Absolutely.
Mushrooms, zucchini, corn, spinach, carrots, and diced tomatoes can all work well.
Avoid adding too many watery vegetables without adjusting the liquid.
Can I make it spicy?
Yes.
Add jalapeños, cayenne pepper, crushed red pepper flakes, hot sauce, or pepper jack cheese.
Can I prepare it ahead of time?
Yes, but for the best rice texture, it is preferable to prepare the cooked beef and vegetables ahead and combine them with the rice and liquid shortly before baking.
How do I know when the casserole is ready?
The rice should be tender, most of the liquid should be absorbed, and the beef and vegetables should be fully cooked.
The cheese should be melted and bubbling on top.
Final Thoughts
This Unstuffed Bell Pepper Casserole is a simple way to enjoy the comforting flavors of classic stuffed peppers without the extra preparation.
Tender rice, seasoned ground beef, colorful bell peppers, tomatoes, and melted cheese come together in one satisfying dish.
It is an excellent choice for easy family dinners, affordable meal ideas, weeknight casseroles, comfort food recipes, and make-ahead meals.
With simple ingredients and plenty of room for customization, this casserole can easily become a regular part of your dinner rotation.
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