Cook Bacon: In a skillet over medium heat, cook the bacon strips for about 8-10 minutes until crispy. Transfer to a paper towel-lined plate to drain grease and crumble into pieces.

Preheat Oven: Set oven to preheat at 400°F (200°C). Gather ingredients for a smooth cooking experience.

Prepare Crust: Place the unbaked pie crust into a 9-inch pie pan, blind bake for 10-12 minutes until edges are lightly golden, then return for an additional 5-7 minutes.

Layer Ingredients: Distribute the crumbled bacon over the bottom, sprinkle cheddar cheese, followed by baby spinach.

Mix Custard: Whisk together eggs and half and half until pale, incorporating salt and black pepper. Add hollandaise sauce if using.

Combine and Bake: Pour custard mixture into the crust. Bake at 375°F (190°C) for 35-45 minutes, until set with a slight jiggle.

Cool: Let the quiche rest at room temperature for about 10-15 minutes before slicing.