FredS Favorite Raisin Custard Pie

Ingredients
- 1 c seedless raisins
- 1 Tbsp vinegar
- 2 12 c water
- 34 c sugar
- 2 egg yolks
- 3 Tbsp cornstarch
- 2 Tbsp butter
Directions
- Cook raisins sugar 1 12 cups water and vinegar about 10 minutes
- Mix egg yolks remaining water cornstarch and butter Add to raisins and cook until thick
- Pour into baked pie shell Serve with whipped topping