Try these tasty fillings; each makes enough for one-third of the dough, so feel free to mix and match various fillings using a single batch of dough.
Dark Chocolate: Whisk together 1 tablespoon brown sugar and 1 teaspoon unsweetened cocoa powder; add 1/4 teaspoon cinnamon, if desired. Sprinkle atop rolled-out dough. Sprinkle with 1/4 cup (1 1/2 ounces) mini chocolate chips or chopped semisweet chocolate. Alternatively, sprinkle 3 tablespoons baker’s chocolate filling mix
atop the rolled out dough and top with mini chocolate chips or chopped semisweet chocolate.
Process 1/2 cup (3 ounces) chopped dried apricots, 3 tablespoons (2 ounces) apricot jam or preserves, 1 teaspoon lemon juice, and a pinch of salt until the apricots are finely chopped, but the mixture isn’t totally smooth.
Combine 2/3 cup (about 4 ounces) peeled, grated apple; 2 teaspoons lemon juice; 1/3 cup (2 3/8 ounces) sugar; 2 tablespoons (1/2 ounce) cornstarch, and 3/4 teaspoon ground cinnamon in a small saucepan. Stir to thoroughly combine. Cook over low heat, stirring frequently, until the apple starts to release its juice. Increase the heat to medium, and bring to a simmer. Simmer, stirring, until the mixture thickens, 1 to 2 minutes. Remove from the heat, and set aside to cool to room temperature; if you want to hasten the process, place in the refrigerator.