Diabetic Chocolate Cheesecake
["margarine for pan", "1 (5 oz.) part skim milk", "Ricotta cheese", "1 1/2 c. (12 oz.) lite cream cheese, softened", "1 whole egg", "3 egg whites", "1 c. unsweetened apple juice (concentrate)", "3 Tbsp. unsweetened cocoa", "1 Tbsp. cornstarch", "1 Tbsp. sugar", "1 Tbsp. vanilla", "2 Tbsp. unsweetened cocoa for topping"]
["Preheat oven to 350\u00b0.", "Grease bottom and side of 9-inch spring-form pan.", "Wrap outside of pan with aluminum foil.", "In the bowl of a food processor or blender, puree all ingredients until smooth.", "Do in 2 batches if necessary.", "With a rubber spatula, scrape mixture into prepared pan.", "Place on baking sheet.", "Bake 45 minutes.", "Turn oven off.", "Leave in oven with door closed for 1 hour.", "Remove and refrigerate."]
["margarine", "milk", "Ricotta cheese", "cream cheese", "egg", "egg whites", "apple juice", "unsweetened cocoa", "cornstarch", "sugar", "vanilla", "cocoa"]