Yield: 4 (2-cup) servings   8 cups peeled, cored, and sliced
apples, such as Granny Smith or Braeburn  2 tablespoons fresh
lemon juice  6 tablespoons firmly packed light brown sugar  3
tablespoons flour  1 teaspoon ground cinnamon  ½ teaspoon ground
nutmeg  3 tablespoons unsalted butter, cut into pieces   Crumble
topping:  ¾ cup all-purpose flour  ¾ cup rolled oats  23 cup
firmly packed light brown sugar  23 cup walnut pieces  ¼
teaspoon salt  ½ cup unsalted butter, melted   Garnish: maple
syrup  1. Preheat oven to 350°. Spray 4 (2-cup) individual
baking dishes with nonstick cooking spray. Set aside.   2. In a
large bowl, toss apple slices with lemon juice. In a small bowl,
combine brown sugar, flour, cinnamon, and nutmeg. Add brown
sugar mixture to apples, tossing to combine. Divide apples
evenly among prepared baking dishes, heaping apples in dishes if
necessary. Dot tops of apples with butter pieces.   3. Bake for
25 minutes.   4. While apples are baking, combine flour for
crumble topping, oats, brown suga