1/4 cup butter
1 large onion
2 celery stalks cut fine
1/4 cup flour
3 cups water
2 cups cubed potatoes
2 teaspoon salt
1 cup chopped spinach (I use frozen)
1/2 cup cream (when dieting, I use canned evaporated skim milk)
shredded Swiss or grated Parmesan (optional)
Melt butter in a pan. Add onions and celery. Cover and cook until tender – about 15 minutes. Stir occasionally. Blend in flour, and add potatoes, water and salt. Stir constantly until boiling. Simmer 30 minutes. Add spinach and cook 2 minutes. Then add cream. Top with grated cheese if desired.