Vichyssoise - cooking recipe

Ingredients

4 leeks
1 large onion
1/2 c. butter
5 c. chicken stock
2 medium potatoes
freshly chopped chives
3 Tbsp. chopped parsley
1 stalk celery
salt and pepper
1 1/4 c. whipping cream

Preparation

Cut the leeks into 1/4-inch slices, using the white parts plus about 1 inch of the lightest green parts.
Chop the onion finely.