Lemon Curd Souffle Tart

Name: Lemon Curd Souffle Tart
Ingredients: 1 stick unsalted butter, room temperature; 2 tablespoons granulated sugar; ½ teaspoon kosher salt; 1 large egg yolk; 1 cup unbleached all-purpose flour, plus more for dusting; 4 large eggs, separated; ⅓ cup plus 3 tablespoons granulated sugar; 1 teaspoon grated lemon zest, plus ⅓ cup fresh juice; Pinch kosher salt; 2 tablespoons unsalted butter; Confectioners' sugar, for dusting