Sour Cream Potato Soup
["3 c. diced raw potatoes", "1/2 c. chopped celery", "1/2 c. chopped onion", "3 c. water", "2 c. milk", "2 chicken bouillon cubes", "2 Tbsp. margarine", "1 Tbsp. all-purpose flour", "salt and pepper to taste"]
["Cook potatoes, celery and onion in water in covered pan until tender; do not drain.", "Press through sieve or mash well.", "Add milk, bouillon cubes and margarine.", "Mix sour cream with flour until smooth.", "Add to soup and cook, stirring constantly, until thickened and bouillon cubes are dissolved.", "Season with salt and pepper."]
["potatoes", "celery", "onion", "water", "milk", "chicken bouillon cubes", "margarine", "flour", "salt"]