Wash the potatoes and cook in plenty of boiling water for about 20 minutes. Cut bacon into strips and fry in a pan without fat for about 6 minutes while turning until crispy. Clean, clean and quarter the mushrooms. Remove the bacon from the pan and fry the mushrooms in portions in the bacon fat. Season with salt and pepper
Clean, wash and cut the spring onions into rings. For the vinaigrette, whisk vinegar, salt, pepper, mustard and honey. Add oil drop by drop to the vinaigrette. Stir the stock and spring onions into the vinaigrette
Rinse potatoes under cold water, drain, peel, slice and carefully toss in the vinaigrette. Fold in bacon and mushrooms. Clean, wash and shake the lamb's lettuce dry. Wash chives, shake dry and chop finely. Season potatoes with salt, pepper and vinegar. Fold in lamb's lettuce and chives and serve