Flavor pairings
Grapefruit’s refreshing, tart flavor makes it a superb companion to fish; it’s also very good with chicken and pork. Spices that marry well with grapefruit include cardamom, nutmeg, cloves, and cinnamon; salt intensifies its sweetness. Fresh ginger and herbs such as mint, basil, tarragon, and rosemary are also good pairings. A surprisingly pleasant marriage comes with chile peppers, both hot and mild.
Grapefruit zest is bitterer than other citrus skin, so you may want to blanch it several times to tame the harshness before adding it to your recipe. And beware of the pith, which is intensely bitter (it’s used to flavor tonic water). A twist of grapefruit zest makes a nice change from lemon or lime in drinks where a little bitterness is welcome.