Step 3: Build the Sauce
Stir in diced tomatoes, tomato sauce, and Italian seasoning. Let the mixture simmer for about 5–7 minutes so the flavors blend together. Taste and adjust seasoning with salt and pepper.
Step 4: Add Creaminess
Once the sauce is ready, stir in the sour cream. This gives the casserole a rich and creamy texture that balances the acidity of the tomatoes.
Step 5: Combine Pasta and Beef Mixture
In a large mixing bowl, combine the drained pasta with the beef and sauce mixture. Add 1 cup of shredded cheese and mix well.
Step 6: Assemble the Casserole
Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish. Spread the beef and pasta mixture evenly into the dish. Top with the remaining shredded cheese.
Step 7: Bake
Place the casserole in the preheated oven and bake uncovered for 20–25 minutes, or until the cheese on top is melted and bubbly with golden edges.
Step 8: Serve and Enjoy
Let the casserole rest for about 5 minutes before serving. This makes it easier to cut and serve. Garnish with fresh parsley or basil if desired.
Tips for Success
- Make it spicier: Add chili flakes or a pinch of cayenne pepper to the beef mixture.
- Healthier swaps: Use whole wheat pasta or ground turkey instead of beef.
- Freezer-friendly: Prepare the casserole up to the baking step, cover tightly, and freeze for up to 2 months. Bake from frozen with an extra 15 minutes of cook time.
- Extra veggies: Sauté bell peppers, zucchini, or mushrooms with the onions to boost nutrition.
Final Thoughts
The Ground Beef Casserole is the ultimate comfort food—warm, cheesy, and filling. Whether you’re preparing dinner for the family, making a dish ahead for busy nights, or bringing something hearty to a gathering, this recipe will never disappoint. It’s proof that simple ingredients can create something truly satisfying.
Would you like me to also create a quick one-pan stovetop version of this casserole for when you don’t want to use the oven?
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