There are plenty of fabulous apple desserts that "trend" just before, and during the holiday season. And we are familiar with so many of them; apple cake, apple bread pudding, apple pie, and stewed cinnamon apples with vanilla ice cream just to name a few. If you're the host for this year's Thanksgiving or Christmas celebration, or if you've been invited to celebrate as a guest in somebody else's home, take a close look at this recipe for apple crumble bars. Warm cinnamon, sweet brown sugar, crunchy pecans, and fresh sliced apples are combined into a lavish yet easy layered bar with a buttery shortbread crust, and a divine streusel topping that makes eighteen hefty servings.