Grapefruit Tart

Directions

1. 1
   Process shortbread in a blender or food processor until graham cracker crumb consistency (about 1 1/3 cup crumbs).
2. 2
   Stir together shortbread crumbs, 3 tablespoons sugar, and 2 tablespoons melted butter in a small bowl. Press mixture lightly into a greased 9-inch tart pan.
3. 3
   Bake at 350 degrees for 10-12 minutes or until lightly browned. Set aside.
4. 4
   Combine 1/2 cup sugar, cornstarch, and salt in a medium-size heavy saucepan. Whisk in juice and egg yolds. Cook over medium-high heat, whisking constantly, 10-12 minutes or until mixture thickens and boils. Remove from heat; stir in 3 tablespoons butter and rind.
5. 5
   Pour filling into prepared tart shell. Cover surface of filling directly with plastic wrap. Chill 2 1/2 hours.
6. 6
   Place red grapefruit sections in an 8-inch baking disk. Sprinkle with 2 tablespoons sugar, and chill until ready to assemble. Drain grapefruit before assembly.
7. 7
   Arrange segments, with outer part of segments facing the edge, around border of tart. Arrange remaining segments around tart, slightly overlapping to cover filling completely. Serve immediately. Chill leftovers.
8. 8
   To make ahead: Prepare crust and filling up to 2 days ahead, but do not top with fruit. Top with grapefruit just before serving.