Lemon Cheesecake Tart

Name: Lemon Cheesecake Tart
Ingredients: 6 tablespoons cold unsalted butter, cubed, plus more for the pan; 1 cup all-purpose flour, plus more for the measuring cup; 1/4 cup confectioners' sugar; 1/2 teaspoon kosher salt; 1 large egg yolk; 8 ounces cream cheese, at room temperature; 1/2 cup granulated sugar; 1 tablespoon lemon zest; Pinch kosher salt; 1 cup full-fat sour cream, at room temperature; 2 large eggs, at room temperature; Confectioner' sugar and lemon slices, for serving, optional