Easy Cheesy Chicken Casserole

Saute a medium sweet onion in butter/olive oil on stove.  Use a large pan or skillet.
Add 2 cans of cream of chicken soup and 1/2 cup chicken broth to onions.  Stir in pan.
Add a 24 oz container of sour cream to mixture.  Stir in pan.
Add shredded cheeses.  l 8oz package of Colby/Monterey Jack and the same amount of shredded Mozzarella cheese.  Sometimes at this point I add a little chopped green chili---and why not?  Pour mixture over a cooked 16 oz pkg of egg noodles in 9 x 13 greased casserole dish. Stir lightly.  Sprinkle more cheese on top.  Can also add bread crumbs.
Cook in oven at 350 for about 50 to 60 minutes.  Can be served with sliced almonds for garnish.