Preheat the oven to 350 degrees. Coat a 25 cm glass pie plate with 3 sprays of the vegetable oil. In the bowl of a food processor, combine the tofu, ricotta cheese, cream cheese, maple syrup, cocoa powder, egg whites, cinnamon, and the liqueurs. Puree until smooth and pour into the prepared pie plate. Place the pie plate on the center rack of the oven. On the bottom rack, place a baking pan filled halfway with water. Bake for 1 hour. While the cake is baking, combine all the topping ingredients in a small bowl and whisk thoroughly. When the cake has cooked for an hour, remove it from the oven, spread the topping on evenly, decorate if you wish, and return it to the oven. Bake for about 10 minutes more, until the topping sets. Refrigerate for 2 hours before serving. Decorate with the Chocolate Sauce Design if you wish. Making a Chocolate Sauce Design: Put a mixture of 2 tablespoons pure maple syrup and 2 tablespoons unsweetened cocoa powder into a squeeze bottle or an improvised pastry bag, which can be made by forcing the sauce into a bottom corner of a sturdy plastic storage bag and pricking a small hole throught which it can flow. Squeeze a series of straight lines across the cake, then rake the tines of a fork across the top in the opposite direction to create a pattern.