Meat: In Skillet, brown sausage. Drain. Transfer drained sausage to a large mixing bowl. Set aside. Place onion, bell pepper (optional) & celery (optional) in food processor. Puree ingredients. Add Puree mixture to the drained sausage. Add eggs and cheese. Knead together like dough. Set aside. Bread: In separate bowl add 2-3 cups bisquik mix. Use your spoon and form a hole in the center. Spoon 1/2 cup mayo in center of busquik mound. Pour 1/3 cup milk into center of busquick mound. Stir busquik, mayo & milk. (Add milk if necessary to thin out the mixture) The goal is to achieve a mixture that is just thin enough to spread. You do not want batter consistency. You do not want a dough to form. With a spatula, spread a thin layer of the bisquik mixture on the bottom of a 11 x 18 inch dish. (The bread will rise when cooking, so no need for a thick layer). Next, spoon meat mixture on top of busquik layer. Lastly, spread a thin layer across the top of meat mixture. Bake@ 350 degrees for 15-30 minutes.