Easy Stuffed Pepper Casserole

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I’ve always loved the flavors of classic stuffed peppers — the tender rice, savory beef, sweet bell peppers, and gooey cheese all mingling together. But let’s be honest: the traditional version takes quite a bit of time and effort to prep and stuff each individual pepper. That’s why I created this Easy Stuffed Pepper Casserole — all the same comfort, none of the fuss.

This recipe has become a staple in my kitchen, especially on busy weeknights. It’s all made in one skillet, layered with seasoned beef, vibrant vegetables, hearty rice, and a generous amount of melted cheese. It’s quick to put together, family-approved, and reheats like a dream. Honestly, once you try it, you might never go back to stuffing peppers again.

Why You’ll Love This Easy Stuffed Pepper Casserole

This casserole is the ultimate comfort food shortcut. It’s everything you love about stuffed peppers — just easier. You’ll love how quickly it comes together with pantry staples and how customizable it is based on what you have on hand. Plus, it’s hearty, filling, and packed with bold flavors in every bite.

From a nutrition standpoint, it’s balanced too — with protein, veggies, and grains all in one dish. Perfect for feeding a crowd or meal prepping for the week.

What Kind of Peppers Should I Use?

You can use any color of bell pepper in this casserole — green for a more traditional, slightly bitter flavor, or red, yellow, and orange for a sweeter bite. I personally love mixing them for a rainbow effect and deeper flavor variety. Just make sure they’re chopped small so they cook evenly with the rest of the ingredients.

Options for Substitutions

This casserole is super forgiving, which makes it great for adapting to different dietary needs or what’s in your fridge:

• Ground turkey or chicken can replace the beef for a leaner option.
• Cauliflower rice works well for a low-carb version.
• Quinoa is a great swap for rice if you’re looking to boost protein.
• Vegan cheese and plant-based meat crumbles make this dish fully dairy-free and meat-free.
• Don’t have tomato sauce? A can of crushed tomatoes with a bit of garlic and Italian seasoning does the trick beautifully.

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Ingredients for this Easy Stuffed Pepper Casserole

• Ground beef: The savory base of this casserole, bringing rich, meaty flavor.
• Bell peppers: A mix of red, green, and yellow adds sweetness, crunch, and vibrant color.
• Onion: Adds aromatic depth and blends perfectly with the meat and spices.
• Garlic: Fresh garlic boosts the savory flavor and adds a subtle punch.
• Cooked rice: A hearty filler that makes the dish satisfying and comforting.
• Tomato sauce: Gives the casserole its rich, slightly tangy base.
• Diced tomatoes: Adds texture and juiciness, complementing the sauce.
• Italian seasoning: Enhances the dish with classic herb flavors.
• Salt & pepper: Essential for seasoning and balancing the flavors.
• Cheddar cheese: Melts beautifully on top for that irresistible gooey finish.
• Mozzarella cheese: Blends with cheddar for a creamy, stretchy texture.
• Fresh parsley (optional): A fresh garnish that adds brightness and color.

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Step 1: Sauté the Vegetables

In a large oven-safe skillet, heat a drizzle of oil over medium heat. Add chopped onions and bell peppers. Sauté until the vegetables begin to soften and the onions are translucent, about 5-7 minutes. Stir in the minced garlic and cook for another 1-2 minutes until fragrant.

Step 2: Brown the Beef

Push the vegetables to the side of the skillet and add the ground beef. Cook until browned, breaking it up with a spatula as it cooks. Mix the beef with the sautéed veggies once fully cooked.

Step 3: Add Tomatoes and Seasonings

Pour in the tomato sauce and diced tomatoes, along with Italian seasoning, salt, and pepper. Stir everything together until well combined. Let the mixture simmer for about 5 minutes to blend the flavors.

Step 4: Add the Rice

Stir in the cooked rice and mix thoroughly. Make sure everything is well incorporated and evenly distributed.

Step 5: Top with Cheese

Sprinkle the shredded cheddar and mozzarella cheese evenly across the top of the mixture. Cover the skillet with a lid or foil.

Step 6: Bake the Casserole

Preheat your oven to 375°F (190°C). Transfer the skillet to the oven and bake for 15-20 minutes, or until the cheese is melted and bubbly. If you want a golden top, uncover and broil for an extra 2-3 minutes.

Step 7: Garnish and Serve

Remove the casserole from the oven and let it rest for a few minutes. Sprinkle with chopped fresh parsley before serving for a fresh finish.

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How Long to Prepare the Easy Stuffed Pepper Casserole

Prep Time: This dish takes about 15 minutes of hands-on prep. That includes chopping the vegetables, cooking the rice (if it’s not pre-cooked), and browning the ground beef. If you use leftover rice or pre-chopped veggies, you’ll cut that time in half.

Cooking Time: Once everything is in the skillet, the simmering and baking process takes around 25–30 minutes. You’ll want to allow about 20 minutes for it to bake in the oven so the cheese can fully melt and everything gets bubbly and cohesive. Altogether, from chopping board to dinner table, you’re looking at approximately 40–45 minutes.

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Tips for Perfect Easy Stuffed Pepper Casserole

• Use leftover rice to save time and ensure the rice holds its texture.
• Brown the meat thoroughly before mixing with the other ingredients — it adds depth of flavor.
• Don’t skimp on the seasoning — this dish thrives on robust Italian herbs and a good balance of salt.
• Use a mix of cheese for maximum melt and flavor.
• Let it rest before serving to help the layers settle and flavors meld.

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Watch Out for These Mistakes While Cooking

• Overcooking the vegetables: You want them tender-crisp, not mushy.
• Using raw rice: Always use cooked rice to avoid undercooked grains in the final dish.
• Skipping the simmer: Letting the tomato mixture simmer helps deepen the flavor.
• Not tasting before baking: Taste your mixture before adding cheese — this is your last chance to adjust seasoning.
• Overloading with cheese: Too much can make it greasy — balance is key.

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What to Serve With Easy Stuffed Pepper Casserole?

1. Garlic Bread

Crispy on the outside, soft on the inside — the perfect scoop companion.

2. Green Salad

A fresh side salad with vinaigrette adds crunch and acidity to balance the casserole.

3. Roasted Broccoli

Simple, healthy, and pairs beautifully with cheesy dishes.

4. Pickled Vegetables

Adds tang and a sharp contrast to the rich flavors.

5. Steamed Green Beans

Light, quick, and kid-friendly. A great veggie option on the side.

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Storage Instructions

Refrigerator: Let the casserole cool completely before transferring to an airtight container. It will keep well in the fridge for up to 4 days.

Freezer: This casserole freezes beautifully. Portion it into individual servings or store the whole dish tightly wrapped in foil and a freezer bag. Freeze for up to 3 months.

Reheating: Reheat in the microwave for 2–3 minutes per portion or warm it in the oven at 350°F until heated through. Add a splash of water or broth before reheating to keep it moist.

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Estimated Nutrition

Per serving (based on 6 servings):

• Calories: ~410 kcal
• Protein: 28g
• Carbohydrates: 32g
• Fiber: 4g
• Fat: 20g
• Saturated Fat: 9g
• Cholesterol: 75mg
• Sodium: 540mg
• Sugar: 6g

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Frequently Asked Questions

What kind of rice works best?

Long-grain white rice is classic, but brown rice or jasmine rice are great alternatives. Just make sure it’s fully cooked.

Can I make this casserole ahead of time?

Absolutely. Assemble the casserole up to the baking step and refrigerate. When ready, bake as directed.

Is this recipe gluten-free?

Yes, as long as your ingredients (especially sauces) are certified gluten-free.

How can I make it spicier?

Add red pepper flakes, diced jalapeños, or a dash of hot sauce while cooking.

Can I make it without cheese?

Yes — just skip the cheese or use a dairy-free version. The casserole will still be delicious and flavorful.

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Conclusion

This Easy Stuffed Pepper Casserole delivers all the comfort of classic stuffed peppers in a quicker, easier, and more family-friendly format. It’s satisfying, flexible, and made for busy evenings when you still want a hearty homemade meal. Whether you’re serving a crowd or meal-prepping for the week, this one-skillet wonder is sure to become a favorite in your kitchen.

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