Hungarian Potato Soup

1 c. chopped onion
2 tbsp. butter or margarine
4 med. potatoes, diced (about 4 c.)
1 1/2 tsp. salt
1/4 c. all-purpose flour
1 1/2 tsp. paprika
1 c. dairy sour cream
3 c. milk

Cook onion in butter until tender; add potatoes, salt and 1 cup water. Cover and cook 15 minutes or until tender. Blend flour, paprika and sour cream until smooth. Stir into potato mixture. Add milk. Heat to boiling, stirring. Cook 1 minute. Serves 6.