2 (16 oz.) bags frozen spinach
1 med. onion
1 can artichoke hearts
3/4 c. sour cream
1 c. Parmesan cheese
1 stick butter

Boil spinach until tender; drain. Chop onion and fry off. Melt butter. Add remaining ingredients. Place in casserole dish. Bake in oven at 350 degrees for about 30 minutes.