Add all your sauce ingredients in to a mixing jug, and mix together well, so that the heated vegetable stock softens the ingredients together. Set aside while you prepare the vegetables.
Cook the rice noodles following the packet instructions, then drain them in a colander and toss them in a little sesame oil to prevent them from sticking together. You do not want the noodles too soft, but still al dente, as they will be heated again in the vegetables and sauce at the end.
To prepare the vegetables, heat 2 tablespoons of sesame oil in a large frying pan with deep sides (or a wok or big saucepan). Stir fry all the vegetables together for about 3 minutes on a medium to high heat.
Pour the sauce onto the vegetables in their pan and simmer gently for 4-5 minutes, until the vegetables are cooked through but still have a good bite to them – not too soft.
Now stir in the cooked rice noodles. Mix together well and heat through. I serve this hot, and sometimes garnished with chopped peanuts and chopped coriander.