The difference between a sorbet and a granita is texture. Sorbets are smooth, whereas granitas are coarse. Makes 4 servings.
Puree watermelon in a food processor. Put melon, simple syrup, and lemon juice in a baking pan such as a 9 x 13-inch pan.
Stir well and freeze about 4 hours until frozen solid.
To serve, scrape up granita with a spoon or fork into goblets or clear, cut-glass dishes.
Garnish with mint sprigs. Buon Appetito!