Cook pasta according to package directions, omitting salt and fat.
Preheat oven to 350°.
Heat olive oil in a large nonstick skillet over medium-high heat. Add onion, bell pepper, sausage, and garlic; sauté 5 minutes or until sausage is browned. Add tomato paste and next 5 ingredients (through diced tomatoes); cover, reduce heat, and simmer 15 minutes.
Combine pasta and tomato mixture; spoon into a 13 x 9-inch baking dish coated with cooking spray. Sprinkle with cheeses. Bake at 350° for 25 minutes or until bubbly.