In skillet, saute onions, garlic and celery until clear. Add crawfish, salt and pepper. Simmer 5 minutes. Grease pie plate. Add crawfish mixture. Beat eggs an d milk for 1 minute. Add Bisquick; beat well. Sprinkle cheese on top of crawfis h. Pour Bisquick mixture over crawfish and cheese. Bake at 180ºC or 30 t o 40 minutes. Cool 5 minutes. Serve warm. Recipe from "One Million Recipes CD" busted by Judy R.