1 (10 oz.) box frozen chopped spinach
1 (8 oz.) jar Hellmann's mayonnaise
1 pt. (16 oz.) sour cream
1 med. onion, grated
1 box Knorr's Swiss vegetable soup

Thaw spinach in colander over bowl. Try to get out as much liquid from spinach by pressing with fork. Take spinach and mix with all other ingredients. Cover and chill. Make a day ahead.