3 bittersweet chocolate caramelized pistachios Recipes

all purpose flour, crumbled pistachio halvah or plain halvah* (about 7 oz), sugar, salt, chilled unsalted butter, cut into 1/2-inch cubes, egg yolks, ice water, sugar, water, heavy whipping cream, chilled unsalted butter, cut into 1/2-inch cubes, natural unsalted pistachios (about 4 oz), toasted, nonstick vegetable oil spray, egg white, heavy whipping cream, unsalted butter, bittersweet (not unsweetened ) or semisweet chocolate, chopped, light corn syrup