Plummy sweets at holiday time surely evoke childhood memories of The Nutcracker with its magical kingdom of fairies, tin soldiers, and the Mouse King. This fruity tart uses a variety of very juicy ripe plums and pluots, a base of apricot paste, and a tasty gluten-free crust, sweetened with dates and scented with Ceylon cinnamon and green cardamom. Delicious and celebratory for breakfast, teatime, or dessert.