How to Make It
In a small bowl, whisk the vinegar and olive oil with the sugar, salt and the 1 tablespoon of chopped mint until the sugar is dissolved.
Using a very sharp knife, peel all of the citrus fruits, being sure to remove any bitter white pith. Thinly slice the citrus crosswise and pick out and discard any pits. Layer the citrus on a platter or in glasses and drizzle evenly with the dressing. Garnish with the pistachios, kumquats and mint and serve.