ALMOND CUSTARD CAKE

Steps:

• Cut a 9-inch round of parchment paper to line the bottom of a 9 × 2-inch round cake pan. Butter and line the pan. Butter the lining, then flour the pan, tapping out excess; set aside.
• Make the dough: Whisk together 2 1/4 cups flour and the almond flour, baking powder, and salt in a medium bowl; set aside.
• Put the butter and 1 1/2 cups granulated sugar in the bowl of an electric mixer fitted with the paddle attachment. Mix on medium speed until pale and fluffy, about 2 minutes. Add 3 egg yolks, 1 at a time, mixing well after each addition and scraping down the sides of the bowl. Add the wine, almond extract, and half the vanilla seeds; mix until combined, about 15 seconds. Add the flour mixture in 2 additions, mixing until just combined (do not overmix).
• Divide the dough in half, and flatten each piece into a disk. Wrap the disks in plastic wrap. Refrigerate 1 hour.
• Make the custard filling: Prepare an ice-water bath; set aside. Fit an electric mixer with the whisk attachment. Put 3 egg yolks and the remaining 6 tablespoons sugar in a clean mixing bowl; beat on medium speed until pale yellow and thickened. Add the remaining 5 tablespoons flour; beat on low speed until combined.
• Bring the milk, remaining vanilla seeds, and zest to a boil in a medium saucepan over medium heat. Pour 1/2 cup hot milk mixture into the egg mixture, and beat on medium-low speed until combined. Stir the mixture into the remaining milk in the saucepan. Bring to a simmer over medium heat, stirring to reach the bottom and sides of the pan. Cook until thickened, 1 to 2 minutes. Set the pan in the ice-water bath; stir occasionally until cool, about 20 minutes.
• Preheat the oven to 375°F. Press 1 piece of dough onto the bottom of the prepared pan and 1 1/2 inches up the sides. Spoon the custard on top, and spread into an even layer.
• On a lightly floured surface, roll the remaining dough into an 11-inch circle. Drape over the pan; trim the edges flush with the pan. Gently press the edges of the top crust to meet the bottom crust; crimp the top edges with a fork to seal. Refrigerate the cake 30 minutes.
• Beat the remaining egg yolk and the cream in a small bowl. Brush the top of the cake with egg wash; sprinkle with almonds. Bake until golden brown, about 35 minutes. Let cool completely in the pan on a wire rack. Invert the cake to unmold; peel off the parchment, and reinvert. Just before serving, dust the cake with confectioners' sugar. Serve with the strawberry-rhubarb sauce.
• Strawberry-Rhubarb Sauce
• Bring the rhubarb, sugar, and 1/4 cup water to a simmer in a medium saucepan over medium-high heat, stirring occasionally. Cook until the liquid is reduced by half, about 8 minutes. Stir in the strawberries and vanilla; cook until the berries are softened, about 3 minutes more. Serve the sauce warm or at room temperature.