Using a spoon or a cookie scoop out and drop 1-inch pieces of dough onto the filling, spaced about 1/2 inch apart. Sprinkle biscuit topping with the turbinado sugar.
Transfer skillet to a 400°F (204°F) oven and bake until biscuits are golden brown and filling is thick and glossy, 30 to 35 minutes, rotating skillet halfway through baking.