Preheat the Oven:

Set your oven to 350°F (175°C).

Prepare the Crust:

If using a pre-made crust, line a 9-inch pie dish with the crust. Pre-bake for 5–7 minutes to ensure a crispy bottom.

Cook the Bacon:

Fry bacon in a skillet until crispy. Remove and let cool, then crumble into small pieces.

Wilt the Spinach:

In the same skillet, sauté the spinach for 1–2 minutes until wilted. Drain any excess moisture.

Whisk the Egg Mixture:

In a large bowl, whisk together eggs, milk, salt, pepper, and nutmeg (if using).

Assemble the Quiche:

Spread the cooked spinach and bacon evenly across the crust. Pour the egg mixture over them, then sprinkle shredded cheese on top.

Bake:

Place the quiche in the oven and bake for 25–30 minutes, or until the center is set and reaches an internal temperature of 160°F.

Cool and Serve:

Let the quiche rest for 5–10 minutes before slicing. Enjoy warm or at room temperature!