Lower oven temperature to 250°F. In mixer bowl, beat cream cheese and sugar until light and fluffy. Beat in eggs one at a time, scraping often. Beat in cream, vanilla and cornstarch until mixture is smooth. Set aside 4 cups of the batter. Add food coloring and melted chocolate to remaining batter; mix until well blended. Pour chocolate batter over crust, spreading evenly. Carefully spoon reserved batter over chocolate batter.