Cut the bacon into fine strips and fry them in a pan without fat for about 5 minutes until crispy. Roughly dice potatoes and mash them with a fork. Peel shallots and cut into fine cubes.
Mix lime juice, honey and mustard. Add oil drop by drop. Add potato, bacon and shallots. Stir in stock and season with cayenne pepper, mace and salt. Clean the salad and wash thoroughly in plenty of water.
Drain or better spin dry in a salad spinner. Clean and clean the mushrooms and slice them into thin slices. Arrange salad and mushroom slices on plates. Drizzle with dressing.