Puff Pastry Cherry Crostata

1/2 (17.3 ounce) package frozen puff pastry sheets, thawed 1 lb. cherries, pitted and halved 2 tablespoons brown sugar 1 tablespoon cornstarch 1/2 teaspoon ground cinnamon 1/2 teaspoon almond extract 1/4 teaspoon salt 1 large egg, beaten 1 tablespoon water 1 tablespoon turbinado sugar 1 tablespoon orange marmalade (optional) Preheat the oven to 400 degrees F (200 degrees C). Line a baking sheet wi…