Heat the oil in a saucepan over a medium heat and cook the curry paste for 1 min before adding the stir-fry veg and prawns. Cook for 3 mins until the prawns are mostly pink, then add the coconut milk, veg stock and noodles.

Bring to the boil, then reduce the heat to a simmer and cook for 5 mins until the noodles are cooked through and the veg is tender but still has a bite. Divide between two bowls and sprinkle over the herbs, chilli and spring onion.