Prep. Heat oven to 375 F and grease a 9” pie pan, or oven-safe skillet (quiche/tart pan won’t work for this quiche).
Crisp + saute. In a large skillet, add bacon (8 pieces sliced) and cook over medium heat until crispy. Place cooked bacon on a paper towel lined plate to absorb excess grease. Add chopped onion (1/2 cup) and thinly sliced leek (1), and cook until softened, about 8 minutes.
Whisk. In a large bowl, whisk together eggs (6 large), heavy cream (1 cup), salt (1/2 teaspoon), dash of pepper, cayenne pepper (1/4 teaspoon) and a pinch of nutmeg until combined. Stir in the cheese (1 cup). Once cooled, stir in bacon, onions, and leeks.
Bake + enjoy. Pour quiche into the greased pan, and bake for 20-25 minutes. You'll know the quiche is done once the edges begin to brown and the center is firm. Allow quiche to cool for 10 minutes before slicing, and enjoy!