For best results, use the KitchenAid Deluxe Hand Blender

Combine the sugar and water in a small saucepan. Bring to the boil whilst stirring, then simmer without stirring for 4 minutes. Add lemon and cinnamon and allow syrup to cool

Place 1 cup of the watermelon chunks into the hand blender beaker. Attach the multipurpose blade to the blending arm

Turn on the hand blender to the highest speed, place the hand blender into the beaker and chop/puree the watermelon for 3 seconds. Add the remaining melon and repeat until you have a smooth puree. Be sure to keep the hand blender below the surface to prevent splashing

Combine the puree and syrup in a high sided, freezer proof dish. Puree briefly on medium speed until thoroughly combined

Place dish into the freezer and allow to set for 1 hour, then puree/chop the mixture again to smash any formed ice. Return the dish to the freezer for another hour. Repeat again until you have a smooth granita

Allow to soften for 5 minutes before shaving with a spoon. Serve immediately in pretty glasses