Method

In a small pot, add water, sugar and rosemary boil for 2-3 minutes. Take off heat and allow to cool down. Strain liquid to remove rosemary.

Once at room temperature, add freshly squeezed grapefruit juice and lemon juice. Using a hand blender, mix together – make sure it becomes frothy.

Pour into a freezable container and place in freezer for about 45 minutes. Check the mixture and stir vigorously for about a minute, and freeze again.