Heat a large nonstick skillet coated with cooking spray over medium-high heat. Add sausage to pan; cook 8 minutes or until lightly browned, turning occasionally. Remove from pan; cool slightly. Cut sausage into 1/2-inch-thick slices.
Wipe pan with paper towels; recoat with cooking spray. Place pan over medium-high heat. Add peppers; sauté 6 minutes. Add sausage; sauté 2 minutes. Add garlic; sauté 2 minutes. Add sauce; bring to a simmer. Reduce heat; cook 5 minutes, stirring occasionally. Remove from heat.
Add mozzarella, stirring until melted. Place 1 cup pasta in each of 6 shallow bowls; spoon about 1 cup sausage mixture over each serving. Sprinkle each serving with 1 teaspoon Parmesan.