Hand-squeezed grapefruit gives this sorbet its refreshing zip without the bitterness of conventionally available grapefruit juice. This flavor is satisfyingly fresh and tart.
Gelato is best when served at 15°F to 20°F. For serving an entire 16 oz or 32 oz portion allow the container to sit in your refrigerator for 20-30 minutes, so that it can warm up for scooping. If you are going to take portions out and return the container to the freezer, use a hot ice cream scoop to remove your portions. Once the gelato has been warmed to serving temperature it is best not to refreeze, as the texture will be compromised.