Heat oven to 350°F. Brown meat with vegetables in large nonstick skillet. Stir in spaghetti sauce, 3/4 cup cooking creme and 1/2 cup mozzarella; cook and stir 2 to 3 min. or until mozzarella is melted. Add pasta; mix lightly. Spoon into 2-qt. casserole; top with remaining cooking creme and mozzarella. Cover. Bake 20 min. or until heated throughuncovering after 15 min.