Preheat oven to 400° F. Place apple juice, couscous, raisins, and spice in a pan and bring to a boil stirring occasionally. Cover and simmer for 12-15 minutes until all free liquid is absorbed. Spoon the mixture into a baking dish and top with apple slices. Sprinkle top with brown sugar. Bake for 25 minutes. Serve hot with yogurt. Serves 8 to 10.