Cook the quinoa following pack instructions and leave to cool.
In a large frying pan or wok, pour in the sesame oil, onion, garlic, ginger,
ground coriander and tamari and fry on a medium-high heat for 2 mins until the moisture starts to evaporate, then add 3 tbsp water. Leave to fry for 1 min more, add the pepper and fry for another 2 mins.
Add 4 tbsp water and fry for another 2 mins, then add another 250ml water. After another 2 mins, add the green beans and another 125ml water.
After another 2 mins, add the courgette, 125ml water and leave to cook for 3 mins, then take off the heat.
Make the dressing by putting all the ingredients in a jug and whisking until smooth. Mix the quinoa into the veg, add the dressing and mix together with the sesame seeds. Stir through the coriander to serve.