Swiss Potato Soup - cooking recipe

Ingredients

3 potatoes, cut into small chunks
1/2 c. chopped onion
2 Tbsp. butter
1 tsp. dry mustard
3 c. milk
1 lb. Swiss cheese slices

Preparation

Saute onion in butter in soup pan.
Add 3 cups water and potatoes.
Cook until potatoes are tender.
With a hand potato masher, gently mash potatoes.
Add dry mustard, milk and Swiss cheese slices.
Cook on low heat until cheese is melted.