Boil water and cook pasta according to package instructions, seasoning with salt.
In a pan, heat olive oil over medium-low heat.
Add chopped onion, green bell pepper, and sliced mushrooms to the pan and sauté until softened.
Stir in minced garlic and lean ground beef, cooking until the beef is browned.
Lower the heat and mix in light cream cheese, fat free greek yogurt, low fat cheese, and pasta water until combined.
Combine the cooked pasta with the beef mixture and stir well.
Serve hot, optionally topped with parsley, chili flakes, or provolone cheese.
