01 - Cook the pasta according to package instructions until al dente. Drain thoroughly and set aside.
02 - Heat a large nonstick skillet over medium-high heat. Add the ground beef or shaved steak and cook until browned, approximately 5-6 minutes. Drain any excess fat if necessary.
03 - Add the diced onion, bell pepper, and sliced mushrooms to the skillet. Sauté for 5-7 minutes until vegetables are softened and beginning to caramelize. Stir in the minced garlic and cook for 1 additional minute until fragrant.
04 - Add Worcestershire sauce, smoked paprika, salt, black pepper, and chili flakes if using. Stir thoroughly to distribute the seasonings evenly throughout the meat and vegetables.
05 - Reduce heat to low. Stir in the cottage cheese and milk, mixing continuously until the cottage cheese melts completely and forms a smooth, creamy sauce coating the meat and vegetables.
06 - Add the cooked pasta to the skillet. Gently fold everything together until the pasta is evenly coated with the sauce and distributed among the meat and vegetables.
07 - Sprinkle the shredded provolone and mozzarella cheeses evenly over the top. Cover the skillet and let stand for 2-3 minutes until the cheese is fully melted and bubbly.
08 - Remove from heat and serve hot. Garnish with chopped fresh parsley if desired.