Wash the potatoes thoroughly, peel them, and slice thinly.
Julienne the onion and cut the sausages into bite-size pieces.
Heat oil in a pan, then stir-fry the potatoes and onions.
When the potatoes are halfway cooked, add the sausages and stir-fry together.
Season with salt and pepper to taste.
Once all the ingredients are fully cooked, serve them on a plate.