Wash the potatoes and cook in boiling salted water for about 20 minutes. Quench cold, peel, possibly halve depending on size and let cool. In the meantime peel onions and cut them into rings. Clean and wash radishes and cut them into fine slices. Wash and chop the dill. Dice bacon finely and leave it crispy. Mix bacon, dill, radishes and potatoes.
Heat vinegar and broth in bacon fat. Add onion rings. Season with salt and pepper. Stir in oil and pour immediately over the potatoes. Cover and leave to stand for about 1/2 hour. Season to taste again before serving. Serve with matie filets