To prepare a Valencia orange sunset pie recipe, first you need to prepare the filling. First, you will need the following ingredients: Preheat the oven to 375 degrees F (190 degrees C). Peel and cut the oranges in half lengthwise. Cut each half into quarters. Place the quartered orange halves in the bottom of an 8-inch pie pan. Fill the rest of the pie shell with the peaches, orange slices, and orange zest. Bake for 20 to 25 minutes, or until the fruit is bubbling and the crust is golden brown. Serve warm or at room temperature.