Pistachio, Strawberry, and Vanilla Semifreddo

Preparation

1. Step 1

   Line a metal loaf pan (approximately 9x5x3") with 2 layers of plastic wrap, leaving generous overhang on all sides.

   Step 2

   Grind pistachios and 2 tablespoons sugar in a food processor until very finely chopped. Transfer pistachio mixture to a small saucepan. Add 1/2 cup milk; bring to a boil. Remove from heat, cover, and let steep for 20 minutes. Set a fine-mesh strainer over a medium bowl; strain, discarding solids. Stir in almond extract; set pistachio mixture aside.

   Step 3

   Place remaining 1/2 cup milk in a separate small saucepan. Scrape in seeds from vanilla bean; add bean and bring to a simmer. Remove from heat, cover, and let steep for 15 minutes. Set a strainer over another medium bowl; strain, discarding solids, and chill vanilla mixture.

   Step 4

   Purée strawberries and 2 Tbsp. sugar in a food processor until smooth. Set a fine-mesh strainer over another medium bowl; strain, pressing on solids to extract as much juice as possible. Discard solids. Stir in vanilla extract and set strawberry mixture aside.

   Step 5

   Whisk eggs, salt, and remaining 1/2 cup sugar in a medium metal bowl. Set bowl over a medium saucepan of simmering water (do not allow bottom of bowl to touch water). Beat egg mixture at high speed until it triples in volume and an instant-read thermometer inserted into mixture registers 170°, about 3 minutes. Remove bowl from over water and continue beating until thick and cool, about 3 minutes. Add one-third of egg mixture to each of the pistachio, strawberry, and vanilla mixtures; fold each just to blend.

   Step 6

   Beat cream in a large bowl until soft peaks form. Add one-third of cream to each of the pistachio, strawberry, and vanilla mixtures; fold each just to blend. Cover vanilla and strawberry mixtures separately; chill. Pour pistachio mixture into pan; smooth top. Cover; freeze until firm, about 45 minutes. Gently pour strawberry mixture over pistachio layer; smooth top. Freeze until firm, about 45 minutes. Gently fold vanilla mixture to blend; pour over and smooth top. Freeze until firm, about 4 hours. DO AHEAD Can be made 3 days ahead. Fold plastic wrap over; seal tightly and keep frozen.

   Step 7

   Uncover semifreddo. Using plastic wrap as an aid, lift from mold. Invert onto a chilled platter; peel off plastic. Slice crosswise.