I've been waiting somewhat impatiently for ruby grapefruits to come into season. Not only is their beautiful red flesh a delight to look at, but their zesty and slightly bitter flavour is unlike any other fruit. Grapefruits work wonderfully in desserts, where that refreshing citrus flavour offsets both the sweetness and richness that could otherwise be cloying. There's no question that gin and grapefruit work well together in cocktails, and the same is true for this cheesecake! Although adding it is technically optional, a touch of gin really brings this cheesecake to life and makes it something special. A neutral...