Put the crushed peppercorns into a medium bowl, then toss with the prawns and a little salt.
Heat 1 tbsp oil in a wok or frying pan over a high heat.
Add the prawns and fry for 30 secs without turning. Stir and leave for another 30 secs-1 min until pink. Set aside.
Heat the rest of the oil in the pan and stir fry the veg and noodles according to pack instructions. Push to the side of the pan, pour the oyster sauce into the empty side, then heat until it bubbles. Toss the prawns back into the pan and stir into the sauce with the noodles and veg for 30 secs until hot.
