Potato Salad - cooking recipe

Ingredients

1 beaten egg
1 scant c. sugar
2 Tbsp. flour
3/4 c. vinegar
1/4 c. water
1 tsp. butter
1/2 c. mayonnaise
1 tsp. mustard
diced potatoes
diced onions
diced celery
salt and pepper to taste

Preparation

Add and mix egg, sugar, flour, vinegar and water (add vinegar and water last).
Cook together until it thickens.
This is over medium heat.
Add to this the butter, mayonnaise, and mustard. Add to this the potatoes, onions, celery, salt and pepper to taste.