Potato Soup - cooking recipe

Ingredients

2 1/2 c. diced potatoes
1/2 c. chopped onions
2 sprigs chopped parsley
celery tops
1 1/2 tsp. salt
2 1/2 c. water
1 1/2 Tbsp. butter
1 1/2 Tbsp. flour
3 c. milk
1 egg, slightly beaten

Preparation

Combine the first 6 ingredients in saucepan.
Bring to a boil; cook gently until potatoes are tender.
Put aside.
Make white sauce of butter, flour and milk; add to stock.
Put in blender. Add egg and heat.
Add salt and pepper to taste.