Vinegar Pie

Directions

1. 1
   Separate eggs.
2. 2
   Put egg whites aside.
3. 3
   Mix eggs (yellows), sugar, flour, butter, salt and vinegar together.
4. 4
   Mix egg whites with mixer, then add to the other mixture gradually.
5. 5
   Put in a 9-inch pie crust.
6. 6
   Bake until done, about 30 to 45 minutes at 350°.