Potato Soup - cooking recipe

Ingredients

3 small potatoes
1 qt. milk
2 slices onion
3 Tbsp. butter
1 Tbsp. flour
1 1/2 tsp. salt
1/4 tsp. celery salt or stalk
a few grains cayenne pepper
1 spoon chopped parsley

Preparation

Cook potatoes in boiling water with salt.
When soft, run through strainer.
Boil milk with onion; remove onion and add milk slowly to potatoes, mixing well with a whisk.
Melt half the butter.
Add dry ingredients.
Stir until well mixed, then stir into hot soup.
Boil one minute; strain and add remaining butter. Sprinkle with parsley.
Thin with hot milk if desired.