Reduce oven temperature to 350°F. Spray 9 1/2-inch glass deep-dish pie plate with cooking spray. In bowl, place Bisquick mix; cut in butter, using pastry blender, until crumbly. Add water; stir vigorously until soft dough forms. Using fingers dipped in Bisquick mix, press dough on bottom and up side of pie plate, forming edge on rim of plate. Crumble 8 slices bacon. Sprinkle crumbled bacon, potatoes, cheese and onions in crust. In bowl, beat half-and-half, eggs and salt with whisk until blended. Pour over ingredients in crust.