Cheesy Beef Tetrazzini

Directions

1. In a large skillet over medium heat, cook beef and onion until meat is no longer pink; drain. Stir in tomato sauce, salt and pepper; bring to a boil. Reduce heat; simmer, uncovered, for 5 minutes.
2. In a bowl, beat cream cheese, cottage cheese and sour cream, until blended. Stir in green pepper, onions and spaghetti. Transfer to a greased 2-1/2-qt. baking dish. Top with beef mixture. Sprinkle with Parmesan cheese. Bake, uncovered, at 350° for 30-35 minutes or until bubbly.