Step 1

Preheat the oven to 400°F, and lightly grease a deep dish pie pan with non-stick spray.

Step 2

Put the (shredded and squeezed) potatoes in a large mixing bowl. Add the beaten egg, oil, Parmesan cheese, salt, and pepper. Use a fork to thoroughly combine the ingredients.

Step 3

Press the potato mixture along the bottom and up the sides of the prepared pie pan. Bake until the edge of the crust turns golden -- 20-25 minutes.

Step 4

Lower oven temperature to 350°F. Tip the ham, spinach, and cheese into the potato shell, and give them a quick toss just to mix them up.

Step 5

In a bowl, whisk together the 5 eggs, salt, pepper, nutmeg, and half-and-half. Pour the mixture oven the ham and spinach filling.

Step 6

Baking the quiche:

Step 7

Bake in the preheated 350°F oven until the custard puffs and browns -- 35-45 minutes. Cool on a wire rack for at least 15 minutes before serving.