Cabbage Potato Soup

4 tablespoons butter
1 cup chopped potatoes
1 cup chopped onions
Salt and freshly ground pepper
5 cups chicken stock
3 cups chopped cabbage leaves
1/2 cup cream

Melt butter in heavy pan. When it foams, stir in potatoes and onions. Sprinkle
with salt and pepper. Cover and simmer on low heat for 10 minutes. Add the chicken
stock and boil until the potatoes are soft. Add the cabbage and simmer with the
lid off for barely 10 minutes. When cool enough put the soup in the blender. Taste
and add more seasonings according to taste. Add cream before serving. Do not bring
to a boil.