Slice the onion thinly. Cut the new potatoes in half, soak them in water, and drain. Place them in a microwave-safe container, cover loosely with plastic wrap, and microwave at 600W for 5 minutes.

Cut the sausages diagonally in half.

Heat salad oil in a frying pan, add the onion and sausages, and stir-fry over medium heat until the onion becomes tender.

Add the microwaved potatoes to the pan, stir-fry until everything is well combined, and season with salt and pepper.