Country Potato Soup

2 cups diced raw potatoes
3/4 cup minced onion
1/2 cup diced celery
2 1/2 cups boiling water
4 tablespoons butter
4 tablespoons flour
1/2 teaspoon pepper
1/2 teaspoon dry mustard
1 1/2 teaspoons Worcestershire sauce
2 cups milk
1 tablespoon parsley (chopped)
Ham pieces or bacon (crumbled) to season

Combine potatoes, onions, celery & 1 tablespoon salt in water.  Cover & simmer 15-20 mintes.  Meanwhile melt butter over low hear.  Add flour and bacon or ham, pepper, mustard, Worcestershire sauce, milk & remaining salt.  Cook stirring until thickened.  Combine w/potato mixture, add parsley.