Vinegar Pie - cooking recipe

Ingredients

1 c. sugar
2 1/2 Tbsp. flour
1 c. cold water
5 Tbsp. vinegar
4 eggs (reserve 2 whites for meringue)
2 Tbsp. margarine
1 tsp. vanilla
1 (9-inch) baked pie shell

Preparation

A little more sugar may be needed.