Preheat the oven to 180C/350F/Gas 4.
For the noodles, heat the vegetable oil in a wok, add the courgette and ground turmeric and fry for 2-3 minutes, or until the courgette is tender. Add the cooked rice noodles and garlic and fry for 2-3 minutes, then stir in the soy sauce, chilli and broccoli and fry for 1-2 minutes.
For the stuffed courgettes, scoop the seeds out of the courgette rounds and discard. Place the hollowed out courgette rounds on a baking sheet.
Season the chopped prawns with salt and freshly ground black pepper and soy sauce, mix well and press spoonfuls of the prawn mix into the middle of each courgette round. Drizzle with sesame oil and sprinkle over the sesame seeds, then bake in the oven for 6-8 minutes, or until the prawns are cooked through and the courgette is tender.
For the chilli sauce, place all of the chilli sauce ingredients into a small saucepan and simmer gently for five minutes, adding enough water as necessary to make a pouring consistency.
To serve, pile the noodles onto two serving plates, place the stuffed courgettes around the sides of the plate and drizzle over the chilli sauce.