Preheat oven to 350 F. Grease sides and bottom of 9x3-inch aluminum springform pan.
Combine crust ingredients and cover bottom of pan.
Beat egg whites till stiff and set aside. In large mixing bowl combine cream cheese, egg yolks, 3/4 c. sugar, and vanilla. Beat until smooth. Fold in egg whites. Place in pan and bake 40-50 minutes, till slightly brown.
Remove from oven and pour the sour cream mixed with 1/4 c. sugar slowly over the top. Return to oven at 475 F for 5 minutes.
Remove from oven and cool. When cool, remove from pan and top with pie filling.
Refrigerate at least 12 hours before serving.