Cranberry Pear Pie

Name: Cranberry Pear Pie
Prep time: 30 min
Cook time: 1 h
Total time: 1 h 30 min
Cuisine: American
Ingredients: 1 double-crusted pie recipe; 5 cups ripe pears (, peeled and sliced or chopped); 2 cups cranberries (, fresh or frozen); 2 tablespoons flour; ⅔ cup granulated sugar; ½ teaspoon ground cinnamon; Zest of 1 orange; 2 tablespoons butter (, cut into small pieces); 1 egg + 1 tablespoon water (, for egg wash); Sanding sugar or granulated sugar (, for sprinkling (optional))