Preheat the oven to 350 degrees. Prepare a 9x13 baking dish with nonstick cooking spray.

Cook pasta according to package directions. Do not overcook as the pasta will continue cooking in the oven. Drain well.

In a large (12 inch) skillet or dutch oven, brown the ground beef with the onions and bell peppers, crumbling the beef as it cooks, until the meat is no longer pink. Add the mushrooms and continue cooking until the mushrooms are softened. Drain well and then return the mixture to the skillet.

To the meat and vegetables, add the tomatoes, tomato sauce, and seasonings. Cook over medium heat for 10 minutes.

In the pasta pot, combine the meat sauce with the pasta. Stir in half of the cheese. Transfer to the prepared baking dish. Cover with aluminum foil.

Bake the casserole for 30 minutes. Remove the aluminum foil and top with the remaining cheese. Continue baking for 10 minutes or until the cheese has melted.