Preheat the oven to 350°F (180°C).

1. In a food processor, mix the flour, spices, and butter. You will get a sandy-looking dough.

2. Add the water little by little until the dough forms a homogeneous ball.

3. Remove the dough from the processor and let it rest for 15 minutes in the cold.

4. Meanwhile, cook the pancetta in a pan and set aside.

5. On a floured work surface, roll out the dough and place it in a tart pan.

6. Bake the dough for about 6 minutes or until the bottom is no longer translucent, then set aside. Reduce the oven temperature to 350°F.

7. Meanwhile, cook the leeks in butter for 5 to 7 minutes.

8. Fill the quiche crust. Season with salt and pepper.

9. In a bowl, mix the milk, cream, and eggs with a whisk.

10. Pour this mixture into the quiche. Add the pancetta, then sprinkle with cheese and bake for 15-20 minutes.