In a medium saucepan, melt the butter over medium-high heat.
1/2 pound Uncooked Sweet Italian Bulk Sausage 1/2 Medium Onion 1/2 Medium Red Bell Pepper 1 tablespoon Crushed Red Pepper Flakes 1 tablespoon Minced Garlic
Add the sausage and cook it, breaking it apart with a wooden spoon, until nearly cooked through and thoroughly broken up, 8 to 10 minutes. Add the onion, bell pepper, garlic, and red pepper flakes and cook, stirring, until the mixture is soft and fragrant, about 3 minutes.
1/2 cup All Purpose Flour
Sprinkle the flour over the mixture and stir until the flour is absorbed
4 cups Milk
Add the milk and cook, stirring, to break up any lumps in the flour and keep the sausage from burning. When the milk simmers, cook, stirring, until the gravy boils.
1 Juice of Lemon Salt and Pepper
Stir in the lemon juice and season to taste with salt and pepper.
1/4 cup Grated Parmesan Cheese 3 tablespoons Fresh Flat-Leaf Parsley
Cook for several minutes longer, stirring, until the gravy thickens. Stir in the cheese and parsley and serve.