Watermelon and Spiced Orange Granitas

These refreshing granitas are glorious in the summer, and particularly welcome as a dessert to follow a spicy tagine. Fruits such as the pineapple, mango and banana, used here, can be cooked under a grill or on a griddle. Make the granitas the day before they are required. If you close your eyes while eating, the flavours will transport you to a beach under the hot Moroccan sun.