→ Fruit Filling
01 - 3 medium apples, peeled, cored, and sliced
02 - 2 medium pears, peeled, cored, and sliced
03 - 1 cup fresh or frozen cranberries
04 - 1/4 cup granulated sugar
05 - 2 tablespoons lemon juice
06 - 1 teaspoon ground cinnamon
07 - 1/4 teaspoon ground nutmeg
08 - 1 tablespoon cornstarch
→ Oat Crumble Topping
09 - 3/4 cup old-fashioned rolled oats
10 - 1/2 cup all-purpose flour
11 - 1/2 cup packed light brown sugar
12 - 1/2 teaspoon ground cinnamon
13 - 1/4 teaspoon salt
14 - 1/2 cup unsalted butter, cold and cubed
15 - 1/2 cup chopped walnuts or pecans (optional)