Cheesy Quiche with Spinach and Ham

In a bowl, mix the flour with a pinch of salt. Add the diced cold butter and rub it into the flour until it resembles wet sand.

Add the egg yolk and 2-3 tablespoons of cold water. Quickly knead the dough until it comes together. If it's too dry, add a little more water.

Form it into a ball, wrap it in cling film, and let it rest in the refrigerator for at least 30 minutes.