In a large bowl, mix together the avocado, egg and lemon flavored yogurt until smooth and well blended. Stir in the shredded cheese and cornmeal mix. Combine the sugar and cinnamon, and stir into the avocado mixture. Spread evenly into a 9x13 inch baking dish.
Bake for 15 to 17 minutes in the preheated oven, or until the top starts to turn golden brown, and a toothpick inserted into the center comes out clean. Cool on a wire rack for at least 30 minutes before serving.
