Blackberry Curd Tart

Preheat oven to 350°.

Weigh or lightly spoon flour into a dry measuring cup; level. Combine flour, powdered sugar, almonds, and 1/8 teaspoon salt in a food processor; pulse to combine. Cut 7 tablespoons butter into small pieces. Add to flour mixture; pulse just until mixture resembles coarse meal. Press in the bottom and up the sides of a 9-inch round removable-bottom tart pan coated with baking spray. Bake at 350° for 30 minutes or until golden. Cool on a wire rack.

Combine berries, 3/4 cup granulated sugar, and juice in a saucepan over medium-high heat; bring to a boil. Reduce heat, and simmer 6 minutes. Place mixture in a blender; let stand 5 minutes. Blend until smooth. Strain the mixture through a cheesecloth-lined sieve into a medium bowl, pressing on solids. Discard solids. Wipe pan clean; return mixture to pan. Combine cornstarch and egg yolks, stirring until smooth. Stir yolk mixture into berry mixture; bring to a boil over medium-low heat. Cook for 1 minute, stirring constantly. Remove from heat; stir in 1/8 teaspoon salt and remaining 1 tablespoon butter. Scrape mixture into a bowl; cover surface directly with plastic wrap. Chill.

Combine 1/8 teaspoon salt, cream of tartar, and egg whites in a large bowl; beat with a mixer at high speed until soft peaks form. Combine remaining 1 cup granulated sugar and 1/3 cup water in a saucepan; bring to a boil. Cook, without stirring, until a candy thermometer registers 250°. Gradually pour hot sugar syrup in a thin stream over egg whites, beating at medium speed, then at high speed until stiff peaks form.

Preheat broiler.

Spoon curd over crust; top with meringue. Broil 2 minutes or until golden.