Ree Drummond's Apple Crisp integrates tender Granny Smith apples, cinnamon and sugar with a buttery oat and brown sugar topping for a warm, comforting dessert. #ReeDrummond #ThePioneerWoman #FoodNetwork #AppleCrisp Get the dish ▶ Register For Food Network ▶ Take one sassy previous city woman, her hunky rancher spouse, a band of cute kids, an extended household, cowboys, 3,000 wild mustangs, a herd of cattle and one placid basset hound and you have The Pioneer Lady. The Pioneer…