Stuffed Mushrooms

2 c. sour cream 1 c. mayonnaise 1 box spinach 1/2 c. onion, chopped fine 1 can water chestnuts, chopped 1 pkg. Knorr-Swiss vegetable soup mix Carrot sticks Celery sticks Parboil and drain spinach. Dice onion, water chestnuts and spinach. Mix with sour cream, mayonnaise and soup mix. Chill. Serve with vegetables.