Creating the Best Quiche Recipe can be straightforward when you follow these steps:

1. Prepare the Crust: In a large bowl, blend the flour and salt. Cut in the butter until the mixture resembles coarse crumbs. Add the ice water, a tablespoon at a time, stirring until the dough forms.
2. Chill the Dough: Shape the dough into a disc, wrap it in plastic, and refrigerate for at least 30 minutes.
3. Preheat the Oven: Preheat your oven to 375°F (190°C).
4. Roll Out the Dough: On a lightly floured surface, roll out the chilled dough into a 12-inch circle. Transfer it to a 9-inch pie dish and trim the excess.
5. Blind Bake the Crust: Place a piece of parchment paper in the crust and fill it with pie weights or dried beans. Bake for 15 minutes in the preheated oven. Remove the weights and parchment, and bake for an additional 5-10 minutes until lightly golden.
6. Prepare the Filling: In a large bowl, whisk together the eggs, heavy cream, milk, Dijon mustard, salt, and black pepper.
7. Add Cheese and Fillings: Sprinkle the shredded cheese and your choice of filling ingredients evenly over the pre-baked crust. Pour the egg mixture over the top, ensuring an even distribution.
8. Bake the Quiche: Place the filled quiche back in the oven and bake for 30-35 minutes until the filling is set and slightly puffed, and a toothpick inserted in the center comes out clean.
9. Cool and Serve: Allow the quiche to cool for 10-15 minutes before slicing. This cooling will help the quiche hold its shape when served.