First, make the syrup. In a small saucepan, combine the sugar, water, and rosemary. Simmer for 5 minutes, then set aside to cool.

Choose a sweet, juicy, red watermelon. Wash the outside, cut it in half, then into slices or however you prefer to cut watermelon.

Blend the watermelon and lime juice with about 1 cup water (240 ml) for 3 minutes. Strain the juice if you like, but it’s optional. Once the syrup has cooled, pour it into a pitcher and stir with a spoon. Add extra rosemary or lime slices for garnish if desired.