This is a refreshing winter salad when everything citrus shines. Ruby grapefruit are sweet and heavy with juice. If you can’t eat grapefruit, navel oranges are in season and, if Cara Cara oranges are available, choose them; they’re exceptional! Some people believe they are a cross between a grapefruit and an orange. They aren’t, so don’t worry if you can’t eat grapefruit.  Mandarins or tangerines are a snap to add in this salad as there’s no need to segment them. Do take a moment to remove the “strings” off the segments, however.