Buttermilk Pie
["1 stick margarine", "3 Tbsp. flour", "3 eggs", "1 c. buttermilk", "1 tsp. vanilla", "a few drops lemon juice", "2 c. sugar"]
["Cream margarine with 2 cups sugar. Add flour, then add egg yolks, buttermilk, vanilla and lemon juice.", "Fold in 3 beaten egg whites. Put in unbaked crust and bake 10 minutes at 400\u00b0, then 300\u00b0 for 30 minutes."]
["margarine", "flour", "eggs", "buttermilk", "vanilla", "lemon juice", "sugar"]