Put the whole creamer potatoes in a saucepan and cover with cold water. Bring to a boil, cook 10 to 15 minutes, drain, cool and cut in half.
Cook the sausages in a skillet or in the oven until an internal temperature of 71° C (160° F) is reached. Keep warm.
In a pan, heat the oil over high heat and cook the onions and potatoes for 5 minutes, add the cut bell peppers and garlic, cook for another 3 minutes, season with salt and pepper.
Transfer to a serving dish and add the cooked sausages, garnish with parsley.