Cherry Crumb Tart

Name: Cherry Crumb Tart
Ingredients: For the streusel:; 1/3 cup (67 grams) sugar; Grated zest of 1 orange (optional); 3/4 cup (102 grams) all-purpose flour; up to 1/4 teaspoons teaspoon ground cardamom (optional); 3/4 stick (6 tablespoons; 3 ounces; 85 grams) cold unsalted butter, cut into small cubes; 1/4 teaspoon vanilla extract; For the filling:; 3/4 stick (6 tablespoons; 3 ounces; 85 grams) cold unsalted butter, at room temperature; 2/3 cup (132 grams) sugar; 3/4 cup (75 grams) almond or hazelnut flour; 1 teaspoon cornstarch; 1 large egg, at room temperature; 1 tablespoon kirsch or 1 1/2 teaspoons pure vanilla extract; 1 partially baked 9 to 9 1/2-inch tart crust made with Sweet Tart Dough; 1 pound (454 grams) cherries, pitted; Confectioners' sugar, for dusting (optional); Crème fraîche, for serving (optional)