Blue Cheese and Pear Tart with Toasted Walnuts

Grind half of the walnuts (50 g) in a food processor. Add the flour and a large pinch of salt, then mix.

Add the cold butter cubes and one egg yolk, and mix only until just combined. (If dry, add 1 tbsp ice-cold water.)

Form into a disc, wrap in baking paper, and chill in the refrigerator for at least 30 minutes.