Chess Pie
["1 stick margarine", "1 1/2 c. sugar", "3 or 4 eggs, well beaten", "1 to 2 tsp. vanilla", "1 Tbsp. vinegar", "pinch of salt", "1 unbaked pie shell"]
["Cream butter with sugar; add eggs, salt, vinegar and vanilla. Pour into pie shell.", "Bake at 300\u00b0 for 10 minutes.", "Raise temperature to 350\u00b0 and bake for 45 minutes.", "Yields 6 servings."]
["margarine", "sugar", "eggs", "vanilla", "vinegar", "salt", "shell"]