Potato-Cheese Soup - cooking recipe

Ingredients

2 potatoes, sliced thinly
1 to 2 stalks celery, chopped
1/2 large onion, chopped
1 3/4 c. boiling water
1/4 c. margarine
2 1/2 Tbsp. flour
1 1/8 tsp. A. 1. sauce
1/2 tsp. mustard powder
1 1/2 c. milk
6 oz. sharp Cheddar cheese
1 (16 oz.) can tomatoes
pinch of parsley or dill weed

Preparation

Cook vegetables in boiling water until soft.
Set aside.