This dish is so versatile, it can do double duty as a potluck side dish and also as a weeknight dinner. If you're looking to add meat to this recipe, a nice sausage cooked and mixed throughout the penne would be so delicious, absolutely no one could resist.
The best part? Just cook the pasta, mix in the cheeses and goodies, and spread on a baking sheet. The high oven temperature creates the perfect crisp layer of cheese that completely defies reasoning while the apples become so soft and tender that they melt in your mouth.
Make this just once and everyone will be immediately asking for more.