In a large skillet put your butter, onions, and bell pepper. Cook over medium heat.
Add the canned tomatoes.
Cook and simmer.until slightly reduced.
Add almost all of the cheese and cream cheese, if using.
Chop or shred your chicken.
Combine chicken, the sauce and your noodles. Put into a 9X13 dish. Sprinkle cheese on top of the dish and bake at 350 degrees and bake for 15-20 minutes, or until hot and bubbly.
Serve hot with a side salad.