In an 12-inch nonstick skillet heat the oil over medium heat. Add polenta in a single layer; cook for 10 to 12 minutes or until lightly browned, stirring occasionally. Remove from skillet; keep warm.
Add sausage, sweet peppers, onion, and mushrooms to skillet. Cook and stir until sausage is brown and vegetables are crisp-tender. Stir in pasta sauce. Add polenta; gently toss to combine ingredients. Heat through. Makes 4 servings.