Using a vegetable peeler, shave long thin, long ribbons from the courgette.
Finely chop the spring onion.
Heat the vegetable oil in a wok, then stir-fry the spring onion for a minute.
Add the courgette slices and stir-fry for a minute, then add the soy sauce and rice vinegar.
Turn down the heat and cover the wok with a lid.
Cook for about 3-5 minutes.
When the courgette is tender, add the garlic and stir for 30 seconds, then add the sesame oil and miso paste. If it’s too dry, add a drop of water.
Turn off the heat and keep stirring until the miso has properly dissolved.
Serve warm or at room temperature with sesame seeds sprinkled on top.