1. Cook pasta shells according to package directions; drain. In a large nonstick skillet, cook beef over medium heat until no longer pink; drain. Stir in the salsa, tomato sauce, corn and beans. Spoon into pasta shells.
2. Place in a 13-in. x 9-in. baking dish coated with cooking spray. Sprinkle with cheese. Cover and bake at 350° for 25-30 minutes or until heated through. Top with sour cream, salsa, olives and onions. Yield: 8 servings.