Preheat the oven to 350 degrees F. Spray a 10-inch cast-iron skillet with nonstick cooking spray, then line the skillet with a parchment circle. Spray the parchment with more cooking spray.
In a large mixing bowl, stir the granulated sugar into the melted butter. Beat in the eggs one at a time. Sift the flour and salt onto the batter. Add the almond extract, dried cherries and orange zest and stir well.
Pour the batter into the skillet. Top with the sliced almonds and the turbinado sugar.
Bake until slightly brown on top, about 35 minutes.
Cool the shortbread in the skillet. When cool, cut into wedges.