2 (10 oz.) pkg. frozen chopped spinach, cooked and WELL drained
1 c. sour cream
1/3 env. dry onion soup mix (stir contents well before measuring)
Buttered bread crumbs
1/2 c. grated cheese

Mix all ingredients together and put in greased casserole. Top with bread crumbs and bake for 20 minutes at 350 degrees.