For the dressing, combine all the ingredients in a bowl and whisk together.
Slice the zucchini flowers lengthwise. Remove and discard the stamens (the pollen) carefully with your fingers.
Heat the oil in a wok or frying pan until smoking, then add the zucchini flowers and squash.
Stir fry for 2–3 minutes on high heat until just tender, then turn the heat off and add ¼ cup of the dressing.
Stir to combine and serve immediately.
