Preheat oven to 375°F Lightly grease 10-inch pie plate.
In large skillet over medium-high heat, heat oil. Add onion; sauté about 5 minutes or until translucent. Stir in turkey; season with Creole seasoning. Cook 3 to 5 minutes until turkey is browned, stirring often. Stir in Mexicorn, with its liquid, and cheese.
In medium bowl, combine baking mix, eggs and water; mix well.
Transfer turkey mixture to prepared pie plate; pour egg mixture evenly on top.
Bake 35 to 40 minutes until quiche is cooked through and golden.