1 cup Simple Syrup, cooled
2 cups diced ripe mangos (riper the better)
Juice of 9 key limes (or to taste)
Thumb-sized piece of Ginger, chunked with skin on
Put all ingredients in a blender and blend till they're pureed. Add more lime juice if it needs more "bite."
Put in a sorbet maker and make. If you don't have a maker, put it in a covered plastic food container in the freezer and shake or stir every 15 minutes or so until it hardens.