Combine flour and salt in a bowl. Add cold butter and rub it into the flour until the mixture resembles coarse crumbs.
Stir in the egg yolk and add cold water, 1 tablespoon at a time, until the dough comes together.
Wrap the dough in plastic wrap and chill for 30 minutes.
Roll out the dough and fit it into a tart pan. Prick the base with a fork and bake at 190°C (375°F) for 15 minutes with pie weights. Remove weights and bake for another 5–7 minutes until golden. Let cool.