Microwave Chocolate Pie
["1 pie shell", "1 c. sugar", "3 eggs", "2 c. milk", "2 Tbsp. cornstarch", "1 tsp. vanilla", "2 Tbsp. butter or margarine"]
["Cook pie shell in regular oven and set aside."]
["pie shell", "sugar", "eggs", "milk", "cornstarch", "vanilla", "butter"]