To begin, prep all of the produce. Peel the mango, then julienne (see photos for size reference).
Wash and dry the radishes and beet. For this recipe, to get 1/2 cup of each, you will likely need 3-4 small radishes and 1 large chioggia beet. If desired, use a vegetable peeler to peel away any imperfections. Then, cut the produce into thin slices then julienne until you have a 1/2 cup of each.
For the scallions, cut off any brown tips on the green portion of the scallions. Cut the green parts into thin slices, and save the white parts for another recipe!
Add the julienned mango, radishes, beet, and scallions to a mixing bowl. Sprinkle with about a pinch (or 1/4 tsp) of salt, and mix.
In a small bowl, mix together the vinaigrette ingredients. Once well combined, pour over the slaw and mix again.
Taste, and adjust seasonings to your liking.
For the best taste, let the slaw sit for about 10 minutes to let the flavors meld.
Serve and enjoy!