Combine Dry Ingredients. In a large bowl, whisk together flour, ground almonds, powdered sugar, salt, and lemon zest.
Incorporate Butter. Using a pastry cutter or your hands, cut the softened butter into the dry ingredients until the mixture resembles coarse crumbs.
Add Wet Ingredients. Mix in the egg yolk and vanilla extract. Stir until the dough starts to come together. Knead gently to form a ball.
Chill. Flatten the dough into a disk, wrap it in plastic, and refrigerate for at least 30 minutes.
Divide Dough. Reserve one-third of the dough for the lattice top and set it aside.
Roll Base. On a floured surface, roll out the larger portion of dough to fit a 9-inch tart pan with a removable bottom. Press the dough evenly into the pan and trim any excess.
Spread Jam. Evenly spread the raspberry jam over the crust, leaving a small border around the edges.
Roll and Cut Strips. Roll out the reserved dough and cut it into 1/2-inch-wide strips using a pastry cutter or knife.
Assemble Lattice. Arrange the strips over the jam in a crisscross pattern, pressing the edges gently to seal.
Bake. Place the tart on the middle rack of an oven preheated to 350F and bake for 25-30 minutes, or until the crust is golden brown.
Cooland Garnish. Allow the tart to cool completely before removing it from the pan. Lightly sprinkle powdered sugar over the top for a festive finish.