Salad Dressing(Cooked) - cooking recipe

Ingredients

3/4 c. sugar
1 egg
1/2 tsp. mustard
salt and pepper to taste
1 scant c. vinegar
1/4 c. milk
1 Tbsp. butter

Preparation

Put egg in saucepan and stir to mix white and yolk.
Add rest of ingredients and cook until thick (add milk last and cook, stirring all the time).