1. Prepare the dough: on a work surface, mix the flour, walnut powder, vanilla sugar, and 1 pinch of salt. Add 125 g of cold butter cut into pieces; work the dough quickly to obtain a crumbly texture.

2. In a bowl, mix the egg yolk with 2 tablespoons of water and add the mixture to the prepared dough.

3. Form a ball, wrap in plastic wrap, and let it sit for 1 hour.

4. Prepare the filling: coarsely chop the walnuts, mix with the remaining butter, egg, and sugar. Add the honey and cream.

5. Preheat the oven to 210°C.

6. Butter and flour the molds. Fill with dough. Prick with a few fork strokes and cover with the walnut and honey mixture.

7. Place a beautiful walnut kernel in the center of each tartelette and bake for 20 to 25 minutes.

8. Remove from the oven and let cool before carefully unmolding.