01 - Heat a large, deep skillet or Dutch oven over medium-high heat. Add the ground beef and cook, breaking it up with a wooden spoon, until browned, about 4–5 minutes. Drain excess fat if necessary.
02 - Add the chopped onion to the skillet and cook for 2–3 minutes until softened. Stir in the minced garlic and cook for 30 seconds until fragrant.
03 - Sprinkle in the Italian seasoning, paprika, salt, and black pepper. Stir well to combine with the beef mixture.
04 - Add the pasta shells, beef broth, and tomato sauce to the skillet. Stir thoroughly to distribute ingredients evenly. Bring the mixture to a gentle simmer.
05 - Reduce heat to medium-low, cover, and cook for 12–14 minutes, stirring occasionally, until the pasta is tender and most of the liquid has been absorbed.
06 - Stir in the heavy cream, cheddar cheese, and Parmesan cheese. Continue stirring until the cheeses are fully melted and the sauce is smooth and creamy.
07 - Taste and adjust seasoning as needed. Remove from heat and let the dish rest for 2 minutes to allow the sauce to thicken slightly.
08 - Sprinkle with chopped fresh parsley before serving, if desired. Serve hot while the cheese is still melted.