Stuffed Pepper Pasta Casserole

There’s something wonderfully comforting about turning the flavors of stuffed peppers into a bubbling pasta casserole. You get tender pasta, sweet bell peppers, savory ground beef, tomato sauce, and plenty of melted cheese in every scoop.

Instead of stuffing individual peppers, everything cooks together in one baking dish. The pasta soaks up the seasoned tomato sauce while the peppers soften just enough to keep a little texture.

It’s the kind of dinner that works especially well on a busy weeknight, but it’s also hearty enough for a casual Sunday dinner or a table full of hungry guests. And since it reheats beautifully, leftovers are something to look forward to.

Why It Works

Stuffed Pepper Pasta Casserole takes the familiar combination of beef, peppers, tomatoes, and cheese and makes it much easier to serve. There’s no need to hollow out peppers or worry about keeping them upright while they bake.

Browning the beef first gives the casserole a deeper, more savory flavor, while sautéing the peppers and onion softens them and brings out their natural sweetness.

The cheese on top melts into a golden, bubbling layer, while the pasta underneath stays saucy and tender. A little Italian seasoning and garlic tie everything together without making the dish taste overly complicated.

Ingredients You’ll Need

Ground Beef

Use lean or moderately lean ground beef. If there’s a lot of rendered fat after browning, drain it before adding the sauce.

Bell Peppers

A mix of red, yellow, orange, or green peppers works nicely. Red and yellow peppers bring more sweetness, while green peppers give the casserole a more traditional stuffed-pepper flavor.

Pasta

Short pasta shapes such as penne, rotini, or ziti are ideal because they hold onto the sauce. Cook the pasta just until al dente so it doesn’t become mushy during baking.

Tomato Sauce And Diced Tomatoes

The combination gives the casserole enough moisture for baking while keeping the tomato flavor balanced. Use plain tomato sauce and canned diced tomatoes for the easiest version.

Cheese

Mozzarella gives you that stretchy, melted topping, while a little Parmesan adds a salty, nutty finish. Shredded cheddar can also be used if you prefer a richer, more familiar casserole flavor.

Seasonings

Garlic, onion, Italian seasoning, salt, black pepper, and a pinch of red pepper flakes give the casserole plenty of flavor without overpowering the peppers.

How To Make Stuffed Pepper Pasta Casserole

Cook The Pasta

Bring a large pot of salted water to a boil and cook the pasta according to the package directions, stopping when it’s just al dente.

Drain it well and set it aside. Don’t overcook it at this stage because the pasta will continue cooking in the oven.

Brown The Beef

Heat a large skillet over medium-high heat. Add the ground beef and cook for about 5–7 minutes, breaking it apart with a wooden spoon, until it’s browned and no longer pink.

Drain excess grease if necessary.

Sauté The Peppers And Onion

Add the diced onion and bell peppers to the skillet. Cook for about 4–5 minutes, stirring occasionally, until the vegetables begin to soften but still have a little bite.

Stir in the garlic and cook for another 30 seconds, just until fragrant.

Add The Tomato Sauce

Stir in the tomato sauce, diced tomatoes, Italian seasoning, black pepper, salt, and red pepper flakes if using. Let the mixture simmer for 5 minutes so the flavors can come together.

Taste the sauce and adjust the seasoning before combining it with the pasta.

Assemble The Casserole

Preheat the oven to 375°F (190°C).

Add the cooked pasta to the skillet and stir until everything is evenly coated. Transfer the mixture to a greased 9×13-inch baking dish and spread it into an even layer.

Sprinkle the mozzarella and Parmesan over the top.

Bake Until Bubbly

Bake uncovered for about 20–25 minutes, until the sauce is bubbling around the edges and the cheese is fully melted.

For a more golden top, switch the oven to broil for the final 1–2 minutes, watching closely so the cheese doesn’t burn. Let the casserole rest for about 5 minutes before serving.

FAQs

Can I Use Another Type Of Ground Meat?

Absolutely. Ground turkey, chicken, or pork can replace the beef. If using a leaner meat such as turkey, a tablespoon of olive oil can help keep the mixture moist while cooking.

Can I Make This Ahead Of Time?

Yes. Assemble the casserole, cover it tightly, and refrigerate it for up to 24 hours. Let it sit at room temperature for about 15–20 minutes before baking, and expect to add a few extra minutes to the cooking time.

Why Is My Pasta Mushy?

The most common reason is overcooking the pasta before it goes into the oven. Keep it firmly al dente when boiling, since it will absorb more sauce while the casserole bakes.

Can I Use Frozen Bell Peppers?

You can, although fresh peppers give the casserole better texture. If using frozen peppers, thaw and drain them first to avoid adding too much moisture.

Can I Make It Spicy?

Sure. Add red pepper flakes to the sauce, use hot Italian sausage in place of some or all of the beef, or stir in a few chopped pickled jalapeños.

Can I Freeze The Casserole?

Yes, but for the best texture, freeze it before baking. Wrap the assembled casserole tightly and freeze for up to 2–3 months. Thaw overnight in the refrigerator before baking.

Recipe Variations

Cheesy Cheddar Version

Replace some or all of the mozzarella with sharp cheddar for a richer, slightly tangy casserole.

Italian Sausage And Beef

Use half ground beef and half mild Italian sausage. The sausage adds extra seasoning and a deeper savory flavor.

Turkey Stuffed Pepper Pasta

Swap the ground beef for ground turkey and add a drizzle of olive oil when sautéing the vegetables if the mixture seems dry.

Extra Vegetable Version

Add sliced mushrooms, zucchini, or spinach along with the peppers. Keep the vegetables chopped fairly small so they cook evenly.

Creamy Tomato Version

Stir ½ cup of softened cream cheese or a splash of heavy cream into the tomato sauce before mixing in the pasta for a creamy variation.

Storage

Refrigerate leftover casserole in an airtight container for up to 4 days. Reheat individual portions in the microwave until hot throughout, or cover the casserole with foil and warm it in a 350°F (175°C) oven until heated through.

If freezing leftovers, portion them into freezer-safe containers and thaw overnight in the refrigerator before reheating.

What To Serve With Stuffed Pepper Pasta Casserole

This casserole is substantial enough to serve on its own, but a simple green salad with a crisp vinaigrette is a nice contrast to the rich, cheesy pasta. Garlic bread, toasted French bread, or warm dinner rolls are also welcome for scooping up the extra tomato sauce, and steamed broccoli or roasted green beans can round out the meal without adding much fuss.

Let the casserole rest for a few minutes before serving. That short pause helps the sauce settle slightly, making it easier to scoop while keeping the cheese pleasantly melty.

For the most flavorful bites, use a mixture of colorful peppers and don’t skip browning the beef well. Those two small steps make a noticeable difference in the finished casserole.

This Stuffed Pepper Pasta Casserole is a comforting, family-friendly dinner packed with tender pasta, savory ground beef, colorful bell peppers, and plenty of melted cheese. Easy to prepare and full of hearty flavor, it’s the perfect cozy meal for busy weeknights.

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Prep Time: 15 minutes

Cook Time: 30 minutes

Total Time: 45 minutes

Servings: 8

Ingredients

• 12 oz / 340 g penne or rotini pasta
• 1 lb / 450 g ground beef
• 1 small yellow onion diced
• 1 green bell pepper diced
• 1 red bell pepper diced
• 2 cloves garlic minced
• 1 can 14.5 oz / 410 g diced tomatoes, undrained
• 1 can 15 oz / 425 g tomato sauce
• 2 tbsp tomato paste
• 1 tsp Italian seasoning
• 1 tsp paprika
• ½ tsp salt
• ½ tsp black pepper
• 1 cup 100 g shredded mozzarella cheese
• ½ cup 50 g shredded cheddar cheese
• 2 tbsp grated Parmesan cheese
• 1 tbsp olive oil

Instructions

Cook the pasta: Bring a large pot of salted water to a boil. Cook the pasta 1–2 minutes less than the package directions. Drain and set aside.

Brown the beef: Heat the olive oil in a large skillet over medium-high heat. Add the ground beef and cook for 5–7 minutes, breaking it apart as it cooks. Drain excess grease if needed.

Cook the vegetables: Add the diced onion, green pepper, and red pepper. Cook for about 5 minutes, until the vegetables begin to soften. Stir in the garlic and cook for another 30 seconds.

Make the sauce: Add the diced tomatoes, tomato sauce, tomato paste, Italian seasoning, paprika, salt, and black pepper. Stir well and simmer for 5–7 minutes.

Combine: Add the cooked pasta to the skillet and stir until everything is evenly coated with the beef and pepper sauce.

Assemble the casserole: Transfer the mixture to a greased 9×13-inch baking dish. Sprinkle the mozzarella, cheddar, and Parmesan evenly over the top.

Bake: Bake uncovered at 375°F (190°C) for 18–22 minutes, until the cheese is melted and bubbly.

Rest and serve: Let the casserole rest for 5 minutes before serving. Garnish with fresh parsley if desired.