Preheat oven to 350 degrees F. Brown meat in skillet with onion and peppers; drain off fat. Meanwhile, cook egg noodles until done. Drain off water and add spaghetti sauce and 1/3 of the bag of cheese. Add meat mixture to noodles, sauce, and cheese and stir well.
Pour mixture into a 9x13 glass baking dish evenly. Top with remaining cheese.
Bake for about 20 to 30 minutes until cheese is melted and food is bubbling.