Stracciatella Semifreddo

ingredients

6 to 8 servings
 
Crust
Vegetable oil cooking sprayvegetable cooking spray1
3 (5-inches long by ¾-inch wide) plain or almond biscotti (about 4 ounces) halvedbiscotti cookies3
¼ cup toasted hazelnuts, toasted *see Cook's Notehazelnuts¼
½ stick (4 tablespoons) unsalted butter, meltedunsalted butter½
Filling
8 egg yolks, at room temperatureegg(s)8
½ cup sugar, plus ¼ cupsugar¾
1 teaspoon pure vanilla extractvanilla extract1
1/8 teaspoon fine sea saltfine sea salt0.1700
1 cup heavy creamheavy cream1
¾ cup chocolate-hazelnut spread, such as Nutella, at room temperaturechocolate-hazelnut spread (such as nutella)¾

instructions

 
Crust
Place an oven rack in the center of the oven. Preheat the oven to 350 degrees F. Spray a 9-by-5-by 3-inch non-stick loaf pan with vegetable oil cooking spray. Using 2 pieces of parchment paper, line the pan, allowing the excess to hang over the ends and sides.

In a food processor, blend the biscotti and hazelnuts together until finely ground. Add the melted butter and pulse until the crumbs are moistened. Using a flexible spatula, press the crumb mixture into the bottom of the prepared pan. Bake for 8 to 10 minutes until the edges of thecrust are golden. Cool the pan on a wire rack for 20 minutes.
Filling
In a medium stainless steel or glass bowl, whisk together the egg yolks, 1/2 cup sugar, vanilla extract, and salt until smooth. Place the bowl over a pan of simmering water, making sure the bottom of the bowl does not touch the water. Whisk until the egg mixture is pale, thick and creamy, and registers 160 degrees F when a thermometer is inserted into the mixture, about 10 to 15 minutes. Place the bowl into a larger bowl of iced water to cool completely.

In another medium bowl, using an electric mixer, beat the cream until thick. Add the remaining 1/4 cup sugar and beat until the creamholds stiff peaks. Mix 1/4 of the cream into the cooled custard. Using a spatula, gently fold the remaining cream into the custard. Drop spoonfuls of the chocolate-hazelnut spread over the custard mixture and gently fold until just incorporated but still chunky. Spoon the mixture onto the prepared crust. Fold the overhanging parchment paper over the custard and freeze for at least 8 hours or up to 3 days.

Run a thin-bladed spatula around the semifreddo between the parchment paper and the pan. Unfold the parchment paper and invert the semifreddo onto a platter. Peel off the paper and cut into 1-inch thick slices. Serve on chilled plates.

cook's notes

To toast the hazelnuts, arrange in a single layer on a baking sheet. Bake in a preheated 350 degrees F oven for 8 to 10minutes until lightly toasted. Cool completely before using.

Special equipment: a 3-by-15-inch piece of parchment paper, a 7 1/2-by-12-
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