Heat oil in a skillet to medium high and fry the potatoes until golden brown on two sides. Since there is very little oil is used, don't forget to move them around every now and then. On low carb diet, we can use rutabaga or simply skip this step.
Remove the potatoes, add sliced onions, salt then saute until a glassy / translucent look.
Add sausages, garlic, mustard seed and caraway. The sausage can be sliced up or added whole as preferred.
Stir fry until the onion starts to caramelize and golden brown spots begin to appear on the sausages, for about 5 - 7 minutes.
Mix in the sauerkraut. Some like to rinse sauerkraut, others like it as it is. It's sourness depends on the brand so make sure it has been tasted before adding it to a dish.
If potatoes or other fun bits were used, add them back to the skillet. Pour a bit of water if no liquid is left at the bottom of the skillet, place the lid on warm then together the ingredients for about 5 - 10 minutes.