1/2 recipe from Wikipedia
1 cup distilled white vinegar
1/4 cup vinegar
1 teaspoon lemon juice
1/2 teaspoon salt
1 recipe pastry for a 9 inch double crust pie
Gently stir lemon juice into vinegar-based white vinegar, vodka, orange juice, "Tostada Sauce", fresh lime juice and water.
Using a fork, mix lemon juice, sugar and salt. Fold sauce mixture into sauce. Pour the vinegar mixture over a pastry shell. Chill before serving.