Rustic Fruit Tarts

Name: Rustic Fruit Tarts
Ingredients: 9 tablespoons (128g) unsalted butter softened; 3 tablespoons (35g) sugar; 1/4 teaspoon salt; 2 large egg yolks; 2 1/2 cups (298g) King Arthur Unbleached All-Pur; 1/4 cup (57g) light cream or milk; 1 cup (227g) sour cream regular or low-fat; 1/4 cup (50g) sugar; 2 tablespoons (21g) Pie Filling Enhancer or 3 tablespoons (21g); 1 teaspoon cinnamon; 1/2 teaspoon cardamom optional; 1 tablespoon (14g) lemon zest (grated rind) or 1/4 teaspoon lemon oil; 3 to 4 large (454g to 567g) apples peeled cored and diced in 3/4" dice or 4 to 5 large peaches or plums peeled pitted and diced; 1 large egg mixed with 1 tablespoon water; coarse sparkling sugar for sprinkling on top