CREAM OF POTATO SOUP

6 c. potatoes, diced
1 c. carrots, diced
1 c. onions, chopped
1 c. celery, chopped
1 1/2 tsp. salt
1/4 tsp. pepper
4 c. milk
1/4 stick margarine

Cook vegetables together in a small amount of water, just to cover vegetables. Add salt, pepper, milk, and margarine. Simmer 30 minutes.