Potato Soup - cooking recipe

Ingredients

1/4 c. margarine
1 large onion, chopped
2 celery stalks with leaves, chopped fine
1/4 c. flour
3 c. water
2 c. cubed potatoes
2 tsp. salt (optional)
1/2 c. milk or cream

Preparation

Melt margarine in large saucepan.
Add onion and celery. Cover and cook over medium-low heat until tender (15 minutes). Stir occasionally.
Blend in flour.
Add water, potatoes and salt; stirring constantly (increase heat).
Bring to a boil, turn down and simmer 30 minutes or until potatoes are done.
Stir occasionally.
Add milk, heat but do not boil (will curd).