Vinegar Pie
["1 c. sugar", "2 Tbsp. plain flour", "1 c. cold water", "4 eggs, beaten", "5 Tbsp. vinegar", "2 1/2 Tbsp. butter", "prepared pie crust"]
["Combine flour and sugar. Add the rest of the ingredients and place in a saucepan. Cook until thick.", "Pour into crust. Bake at 350\u00b0 until crust is brown."]
["sugar", "flour", "cold water", "eggs", "vinegar", "butter", "crust"]