1 (9 inch) unbaked pie crust (boxed or homemade both work)
8 slices bacon, cut into 1 inch pieces
1/2 cup chopped leeks (white and pale green parts only) *If you do not have leeks, than use 1/2 cup of diced green onions
1/2 cup chopped onion
salt and freshly ground black pepper to taste
1 pinch cayenne pepper, or more to taste
3 eggs
2 egg yolks
1 cup heavy cream
3/4 cup milk
1 teaspoon chopped fresh thyme (dried if you don't have fresh)
6 ounces shredded Gruyere cheese (Swiss if you can't get Gruyere)