Hazelnut and Almond Macaroons with Orange Semifreddo

Preheat oven to 200 °F. Line a large baking sheet with parchment paper. Draw or trace 12 (3-inch) circles 1 inch apart on parchment and turn paper over on baking sheet. Put egg whites in a metal bowl set over a pan of simmering water and gently whisk constantly until barely warm. Remove bowl from heat and beat whites with a pinch of salt with an electric mixer until they just hold soft peaks. Gradually add 1/2 cup superfine sugar, beating until whites just hold stiff, glossy peaks. Fold in remaining 1/4 cup sugar, then nuts. Transfer meringue to pastry bag and pipe 12 rounds of meringue inside drawn circles on parchment. Bake in middle of oven until dry to the touch and crisp, about 1 1/2 hours. If macaroons are not crisp after 1 1/2 hours, turn off oven and let stand in oven 30 to 40 minutes more. Peel macaroons off parchment and transfer to a rack to cool (macaroons may stick if cooled on paper).