What a perfect winter dessert! Seasonal citrus pairs up with pineapple and shredded coconut in a simple, not too sweet fruit salad. Note that it only takes a few minutes to prepare, but it's best when allowed to sit for a couple of hours to let the flavors develop.
Initially reducing the grapefruit juice by half will concentrate its flavor and give the curd's citrus taste more of a punch, as well as a deeper flavor. You can use regular sugar or honey here, but avoid maple syrup or brown sugar, or the curd will look muddy. In a pretty jar, this would make an excellent gift (if you can bear to part with it!)