APRICOT WALNUT BARS

Steps:

• Put oven rack in middle position and preheat oven to 425°F. Butter a 9-inch square baking pan and line with 1 sheet of foil, leaving a 2-inch overhang on 2 opposite sides, then butter foil.
• Pulse flour, sugar, cinnamon, and salt in a food processor until combined. Add butter and pulse until mixture resembles coarse meal with some roughly pea-size butter lumps. Add yolks and vanilla and pulse just until clumps of dough form, about 30 seconds.
• Press three fourths of dough evenly onto bottom of pan, then spread with apricot preserves. Crumble remaining dough over preserves and sprinkle evenly with walnuts.
• Bake until top is golden brown and preserves are bubbling, 20 to 25 minutes. Cool in pan on a rack. Lift from pan by grasping both ends of foil. Cut into 32 bars and lift bars off foil with a spatula.