We combined two classic pies into one giant pie bar for a crowd-friendly dessert that's twice as tasty. Thanks to tart apples and cranberries, it's not too sweet, either. The best part is that you don't need to fuss with traditional pie crust: you simply create a shortbread-like dough that you'll press into the baking dish (that's right: no rolling pin necessary). As if that's not easy enough, you'll reserve some of the dough for the top of the pie—just stir in some oats and you've got a crumb topping. Serve with vanilla ice cream for the ultimate holiday dessert.