For the dressing, in a small bowl or jar, combine the vinegar, lime & zest, ginger, oils, Sambal Oelek or Sriracha to taste, sugar & fish sauce. Mix.
Place slaw ingredients, the cabbage, onion, carrots, and radishes, and mix. Add dressing to moisten (there may be a bit of leftover dressing) and toss to combine. Garnish with cilantro if desired.
This is best if made a little bit ahead and continues to improve with time for a day to two.
Find it online: https://frugalhausfrau.com/2016/10/27/vaguely-vietnamese-slaw/