THE BEST-EVER STUFFED BELL PEPPER CASSEROLE
A hearty casserole loaded with tender bell peppers, seasoned ground beef, rice, tomatoes, and melted cheese — pure comfort food.
INGREDIENTS (FULL, DETAILED LIST)
For the Meat & Vegetables
- 1 lb (450 g) ground beef
- ½ lb (225 g) ground sausage optional but adds huge flavor
- 1 large onion, diced
- 3–4 bell peppers, chopped
(mix red, green, yellow for best flavor and color) - 3 cloves garlic, minced
Seasonings
- 1 ½ tsp salt
- 1 tsp black pepper
- 1 tsp paprika
- 1 tsp garlic powder
- 1 tsp onion powder
- 1 tsp Italian seasoning
- ½ tsp crushed red pepper flakes (optional)
Sauce Base
- 1 can (15 oz / 425 g) tomato sauce
- 1 can (14.5 oz / 411 g) diced tomatoes (with juice)
- 1 cup beef broth
- 2 tbsp tomato paste
- 1 tbsp Worcestershire sauce
- 1 tbsp brown sugar (balances acidity)
Rice
Choose one option:
Option 1: Pre-cooked rice (recommended, never mushy)
- 2 cups cooked white rice
Option 2: Uncooked rice (cooks in the casserole)
- 1 cup uncooked rice (white long-grain)
- Add 1 extra cup broth
Cheese
- 2 cups shredded cheddar
- 1 cup mozzarella
(or any combo you love)
For Topping
- Fresh parsley
- Extra cheese
- Cracked pepper
STEP-BY-STEP DIRECTIONS (VERY LONG & DETAILED)
1. Brown the Meat
- Heat a large skillet over medium-high heat.
- Add ground beef + sausage.
- Cook 7–8 minutes, breaking apart the meat.
- When mostly browned, add the diced onion.
- Cook until onion softens (3–4 minutes).
- Add garlic and cook 1 minute.
- Drain excess grease.
The mixture should be fragrant, savory, and slightly caramelized — this builds flavor.
2. Add the Bell Peppers
- Add chopped bell peppers to the skillet.
- Stir and cook 5–7 minutes until slightly softened but not mushy.
- Season with:
- salt
- pepper
- garlic powder
- onion powder
- paprika
- Italian seasoning
- red pepper flakes
You want peppers to soften so they blend into the casserole but still keep some structure.
3. Build the Sauce
Add the following directly into the skillet:
tomato sauce
diced tomatoes
tomato paste
beef broth
Worcestershire sauce
brown sugar
Stir well.
Simmer 5–10 minutes to deepen the flavor.
4. Add the Rice
Depending on the type you choose:
If using cooked rice (best texture):
- Stir in 2 cups cooked rice.
If using uncooked rice:
- Stir in 1 cup dry rice
- ADD 1 additional cup broth
- Simmer 5 minutes before baking
Cooked rice gives a structured casserole
Uncooked rice gives a softer, more blended texture
5. Add Cheese Into the Mixture (Optional but AMAZING)
Stir in:
- ½ cup mozzarella
- ½ cup cheddar
This melts into the casserole and makes it richer.
6. Transfer to a Baking Dish
- Preheat oven to 375°F (190°C).
- Grease a 9×13 baking dish.
- Pour the entire mixture into the dish.
- Smooth the top.
7. Add the Cheese Topping
Sprinkle on:
remaining cheddar
remaining mozzarella
Use more if you want a thicker cheese crust.
8. Bake
Bake in preheated oven:
375°F (190°C): 25–30 minutes
—or—
Until sauce is bubbling and cheese is melted, golden, and irresistible.
If you want a browned top:
Broil the last 1–2 minutes.
9. Rest Before Serving
Let it sit 10 minutes.
This helps the casserole firm up and slice beautifully.
SERVING SUGGESTIONS
Serve with:
- garlic bread
- green salad
- roasted broccoli
- mashed potatoes
- warm rolls
Top with:
- fresh parsley
- crushed red pepper
- extra parmesan
VARIATIONS (AMAZING FLAVOR OPTIONS)
Cheesy Tex-Mex Stuffed Pepper Casserole
Add:
- 1 tsp chili powder
- 1 tsp cumin
- 1 cup corn
- 1 cup black beans
Use pepper jack cheese.
Italian Version
Add:
- fresh basil
- more Italian seasoning
- provolone + mozzarella on top
Creamy Version
Mix in:
- ½ cup cream cheese
- or
- ½ cup heavy cream
Moroccan-Inspired
Add:
- cumin
- paprika
- parsley
- pinch cinnamon
Low-Carb Version
Replace rice with:
- cooked cauliflower rice
STORAGE
- Refrigerate: 3–4 days
- Freeze: up to 3 months
- Reheat: oven or microwave
This casserole reheats perfectly — gets even better the next day.