This recipe makes enough dough for two tarts. If only making one tart, the other half of the dough can be refrigerated for up to 2 days, or frozen for up to 2 months.
For the recipe the crust is prebaked. Prebaking ensures the crust will be nice and brown when the lemon filling is added.
Sift the powdered sugar and the flour into separate bowls.
With a stand mixer beat the butter and salt together on medium speed until well combined, about 1 minute. Scrape down the sides of the bowl and add the powdered sugar. Mix on low speed until combine. Scrape down the sides of the bowl.
Add the almond flour and the vanilla and mix on low speed until combined.
Add the eggs and 1/3 of the flour and beat on low speed until well combined. Scrape down the bowl. Add the remaining flour and mix on low speed until the dough comes together. The dough will be soft.
The dough will weigh about 670 grams. Split the dough into two pieces, 335 grams each, shape each into a circle and wrap in plastic wrap. Refrigerate for at least 2 hours.
Lightly butter a 9-inch tart pan. Do not use too much butter. Remove the dough from the refrigerator and roll it out to 1/4-inch thick circle. Fold the dough in half and place into the pan. Unfold the dough and gently press the dough into the base and sides of the pan being careful not to tear the dough. Remove excess dough for the edge of the dough is even with the top edge of the pan.
Refrigerate the dough for at least 1 hour.
Preheat the oven to 325°F.
Blind bake the tart dough. Line the dough with aluminum foil and fill it with pie weights or beans. I use dried beans and keep a jar of beans in my pantry. Bake the dough for 15 minutes. Remove the dough from the oven and remove the beans and foil. Return the dough to the oven and bake for another 15 minutes until the crust is golden brown.
Remove from the oven and place it on a wire rack. Leave the oven on at 325°F while you make the lemon curd,