01 - Preheat oven to 375°F (190°C). Arrange pie crust in a 9-inch pie dish, gently pressing and crimping the edges.
02 - In a large mixing bowl, whisk together eggs, whole milk, heavy cream, maple syrup, ground cinnamon, salt, and nutmeg until fully blended and smooth.
03 - Scatter cooked bacon or vegetarian alternative, diced apple, and shredded sharp cheddar cheese evenly across the bottom of the pie crust.
04 - Pour the egg mixture gently over the add-ins, ensuring even distribution throughout the pie dish.
05 - Bake in the preheated oven for 35 to 40 minutes, until the center is just set and the surface develops a light golden color.
06 - Allow the quiche to cool for 10 minutes. Drizzle with pure maple syrup before slicing and serving.