Spray a large casserole dish with non-stick cooking spray. Then add in pasta, chopped roasted red bell peppers, spicy Italian sausage, and sauce. Toss well them add 8 dollops (tablespoons) of ricotta, sprinkle with caramelized onions and grated cheese.
Bake for 30 minutes or until the inside of the pasta is hot and the cheese is melted.