Asparagus Casserole

2 cans asparagus, drained
1/4 c. onion
1 can Cream of Mushroom
1/2 c. butter, melted
2 c. chips or crackers
8 oz. cheese

Preheat oven to 350.  Pour both cans of asparagus and in a greased casserole dish.  Mix in onion.  Pour the Cream of Mushroom soup over the asparagus.  Top with cheese.  Mix butter with chips or crackers.  Sprinkle butter and chip mixture on top of Cream of Mushroom.  Bake at 350 for 25-30 minutes.