1 med. onion, chopped
2 tbsp. butter
1 (15 oz.) can chopped spinach
4 oz. noodles, cooked
1/4 tsp. salt and pepper
1 can mushroom soup

Saute onion in butter. Combine with drained spinach, noodles, salt, pepper and soup. Turn into buttered casserole dish. Bake uncovered at 375 degrees for 20-25 minutes.