Cream Cheese Muffins

margarine graham cracker crumbs 3/4 c. sugar 2 (8 oz.) cream cheese 3 egg yolks 3 egg whites 3/4 c. sour cream 1 tsp. vanilla 2 1/2 Tbsp. sugar cherry pie filling Grease small muffin pans with margarine and sprinkle with graham cracker crumbs. Mix together 3/4 cup sugar, cream cheese and egg yolks. Beat egg whites and fold into cream cheese mixture. Pour into muffin pans. Bake at 350 ° for 15 minutes. Then mix together sour cream, vanilla and 2 1/2 tbs. sugar, put in center of muffins and return to oven at 400° for 5 minutes. Let cool; put pie filling on the muffins.