Step 1 Using a hand-held or standing mixer, blend the butter and sugar just until almost smooth (don't overmix). Add the flour and the almond meal, then the egg. The dough should be smooth without any lumps or butter streaks, but be careful not to overmix. Gather the dough into a ball, wrap with plastic wrap and chill for at least 3 hours or overnight.
Step 2 Heat the oven to 350 degrees. Remove the dough from the refrigerator and roll out on a lightly floured surface to about one-fourth-inch thick and about 12 inches in diameter. Roll the dough around the rolling pin and carefully lift it into a 9-inch round tart pan. Lift the edge of the dough with one hand; use the other to gently press the dough into the bottom and against the sides of the pan. Trim the edges of the dough against the edge of the pan, and chill the tart in the refrigerator for 30 minutes.
Step 3Put the tart on a baking sheet and bake with weights for 15 minutes. Remove the weights and continue to bake for another 15 minutes, until golden-brown. Remove from oven and let cool to room temperature.