Step 1: Cook the Pasta

• Bring a large pot of salted water to a boil.
• Add pasta and cook according to the package instructions until al dente.
• Drain and set aside.

Step 2: Cook the Ground Beef

• In a large skillet, heat olive oil over medium heat.
• Add the diced onion and garlic, and sauté for 2-3 minutes until fragrant.
• Add the ground beef and cook until browned, breaking it up with a spatula.
• Drain excess grease if needed.

Step 3: Prepare the Sauce

• Add the diced tomatoes, tomato sauce, beef broth, and seasonings (Italian seasoning, salt, black pepper, paprika, red pepper flakes) to the cooked beef.
• Stir well and let the mixture simmer for 10 minutes to blend the flavors.

Step 4: Assemble the Casserole

• Preheat your oven to 375°F (190°C).
• In a large mixing bowl, combine the cooked pasta, sour cream, ricotta cheese, and half of the shredded cheese.
• Add the beef mixture and stir until everything is well coated.
• Transfer the mixture to a greased 9×13-inch baking dish.

Step 5: Bake

• Sprinkle the remaining cheddar and mozzarella cheese on top.
• Cover with aluminum foil and bake for 20 minutes.
• Remove the foil and bake for another 10 minutes until the cheese is melted and bubbly.
• Remove from the oven and let it rest for 5 minutes before serving.