Prebake 1 batch of the Savory Keto Pie Crust. Set aside and allow to cool.
Preheat oven to 375°F.
Add the chopped bacon to a large pan and cook until almost crispy.
Add the sliced leeks to the pan with the bacon.
Cook down the leeks until caramelized and bacon until crispy. About 10-15 minutes.
Remove the cooked leeks and bacon to a colander and drain the excess fat.
Whisk 4 eggs with heavy cream with a pinch of salt and pepper.
Mix in the bacon and leeks with the whisked eggs along with half of the grated gruyère cheese.
Pour the filling into the prebaked Savory Keto Pie Crust.
Mix in the chopped fresh parsley.
Top with the remainder of the grated gruyère cheese.
Cover the pie edges with aluminum foil (they might burn otherwise).
Bake for about 15-20 minutes until the center is very slightly jiggly. This will help us prevent from overcooking the quiche. (You may need to use your judgement here, all ovens are slightly different in their cooking time).
Once removed from the oven, let the quiche rest for about 5-8 minutes.
Serve on its own or with a simple side salad and enjoy!