This recipe yields enough dough for one Lemon Pine-Nut Tart.
Combine flour, cornmeal, sugar, baking powder, and salt in a food processor; pulse several times. Add butter; process until mixture is the consistency of coarse meal, about 7 seconds. With motor running, add yolks and enough ice water so dough comes together. Do not overmix.
Divide dough in half; press to flatten into disks. Wrap each in plastic; chill at least 30 minutes or overnight.