Ingredients: - 1 cup (2 sticks) unsalted butter, softened - 1/2 cup granulated sugar - 2 large egg yolks - 1 teaspoon vanilla extract - 2 cups all-purpose flour - 1/4 teaspoon salt - Zest of 1 lemon - 1/2 cup raspberry jam - Powdered sugar, for dusting (optional) Instructions: 1. Preheat your oven to 350°F (175°C). Line