1Heat oven to 400°F. Spray 9-inch glass pie plate with cooking spray.
2In medium bowl, stir Bisquick mix and softened butter until mixed. (Mixture will be crumbly.) Add hot water; stir until soft dough forms. Press dough in bottom and up side of pie plate.
3Layer cheese, sausage and green onions over crust in pie plate. In medium bowl, beat half-and-half, Cajun seasoning and eggs with whisk or fork until blended. Pour in pie plate.
4Bake 32 to 38 minutes or until knife inserted in center comes out clean. Let stand 10 minutes before serving.