Mother's Potato Salad

This recipe came from my Aunt Joanne, who was the wife of my mother's brother.  So this is her Mother's potato salad!

Mother's Potato Salad

4 large potatoes, peeled, cubed, and cut into squares
5 stalks of celery, chopped
Onion, chopped fine
2 hard cooked eggs, chopped

1 egg, beaten
1/2 c sugar
1 T flour
1/2 c water
1/2 c white vinegar
2 T butter
Salt and pepper

Boil the potatoes until just tender and the eggs until hard.  Mix the potatoes with the celery, onion, and eggs in a large serving bowl and set aside.  Make the dressing by mixing the beaten egg through the salt and pepper in the order listed, stirring over heat in a saucepan.  Boil until thick; cool before adding to the salad.