To prepare crust: Preheat oven to 400°F. Coat a 9-inch deep-dish pie pan with cooking spray. Stir potatoes, 1 egg, Parmesan, oil, salt and pepper together in a medium bowl. Transfer the potato mixture to the prepared pan and press it evenly into the bottom and up the sides of the pan. Bake until the crust is set and beginning to brown around the edges, about 25 minutes.
To prepare filling and bake quiche: Evenly scatter bacon, spinach and Cheddar over the crust. Whisk eggs and sour cream in a small bowl until smooth. Whisk in milk, salt and pepper. Pour the egg mixture over the other filling ingredients. Reduce oven temperature to 350°F. Bake the quiche until the filling is set in the center and beginning to brown slightly, 35 to 45 minutes. Let cool slightly before serving.
255 calories;14 g fat(6 g sat); 1 g fiber; 17 g carbohydrates; 16 g protein; 44 mcg folate; 212 mg cholesterol; 2 g sugars; 0 g added sugars; 1,257 IU vitamin A; 2 mg vitamin C; 204 mg calcium; 1 mg iron; 526 mg sodium; 632 mg potassium
Vitamin A (25% daily value), Calcium (20% dv)