01 -
Heat your oven to 425°F (220°C). Grab a 9-10 inch springform pan that won't leak. Spray it with cooking oil, put parchment paper on the bottom and sides, then spray again. You can also just use a deep 9 or 10-inch pie dish if you want.
02 -
Make sure you've squeezed all the water from your hash browns with paper towels. Grab a big bowl and throw in the hash browns, whisked egg, cooled melted butter, onion powder, garlic powder, salt, and pepper. Stir everything together well.
03 -
Push the mixture into your pan, making sure to cover the bottom and go up the sides. Spray it lightly with cooking oil for extra crispiness. You can use a glass or measuring cup bottom to pack it down evenly. Bake for 20-30 minutes until it looks golden and crispy. Take it out and let it sit.
04 -
Get a big frying pan and cook the leeks and red peppers in butter for about 10 minutes. Toss in the mushrooms and cook another 2-3 minutes. Move all the veggies to one side, throw in the chopped prosciutto and quickly make it crispy. Turn off the heat and let everything cool down a bit.
05 -
In a big bowl, beat the eggs, cream, salt, and pepper until they're nice and smooth. Gently stir in the cooked veggies, artichoke hearts, Gruyere cheese, and prosciutto. The mixture will be pretty thick.
06 -
Put your crust on a baking sheet lined with parchment paper in case anything drips. Pour all the egg mixture into your pre-baked crust. Put it in the hot 425°F (220°C) oven and RIGHT AWAY TURN DOWN the heat to 400°F (205°C). Let it bake uncovered for 45 minutes, then loosely cover with foil and bake another 10-20 minutes until it's golden brown and barely wiggles in the middle. Stick a toothpick in the center and it should come out clean.
07 -
Let your quiche cool for 5-10 minutes before you take it out of the pan, cut it, and dig in.