Put peeled and diced potatoes in a large pot and cover with cold water. Add salt and bring to a boil. Reduce the heat and simmer until tender, about 20 minutes.
Meanwhile, in a large sauté pan brown the sausages in oil on all sides over medium-high heat. Remove sausages to a plate and keep warm. Add the onions to the pan and cook until soft.
Add garlic and sauté for about 30 seconds. Stir in flour, cook for 1 minute. Add the chicken bouillon, wine, basil, parsley and rosemary. Cook until wine has reduced to a glaze over the onions, about 10 minutes. Return the sausages to the pan and simmer for about 5 more minutes. Season with salt and pepper, to taste.
Drain the potatoes and mash with milk, butter and mustard. Transfer the bangers and mash to a serving dish and dig in!!! I mixed a cup of red wine with one cup of Coca Cola to make my favorite drink Bambus, as we call it in Bosnia. Yum! Try it - even the non wine lovers will like it.