Potato Soup - cooking recipe

Ingredients

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

Preparation

Cook potatoes in boiling water with salt.
When soft, run through a stainer.
Boil together milk and onions; remove onions and add milk slowly to potatoes, mixing well with a whisk.
Melt half the butter.
Add all dry ingredients and stir until well mixed, then stir into hot soup.
Boil 1 minute, strain and add remaining butter.
Sprinkle with parsley, if desired.
If soup is too thick, add a little more milk.