How to Make It
Using a sharp knife, cut the skin and white pith from the grapefruits and oranges. Working over a bowl, cut between the membranes to release the sections into the bowl. Squeeze the membranes to extract the juice.
In a small bowl, stir the olive oil with the honey and lemon juice. Add 3 tablespoons of the citrus juice and season with salt. Reserve the remaining citrus juice for another use.
In a shallow serving bowl, toss the fennel and citrus sections with the dressing. Garnish with the chopped fennel fronds, mint leaves and ground coriander and serve right away.