Preheat oven to 400°.
Cook pasta according to package directions, omitting salt and fat. Drain well.
Remove casings from sausage. Place sausage, onion, pepper, and garlic in a Dutch oven coated with cooking spray over medium-high heat; sauté 8 minutes, stirring to crumble.
Add tomatoes, olives, tomato paste, capers, and anchovy paste to pan; bring to a boil. Reduce heat, and simmer 5 minutes. Remove from heat. Add pasta, tossing well to combine. Spoon pasta mixture into an 8-inch square baking dish coated with cooking spray; sprinkle evenly with cheese. Bake at 400° for 15 minutes or until cheese melts and begins to brown.