Wash the potatoes and cook covered for about 20 minutes. quench, peel and let cool down
Cook the lentils covered in approx. 800 ml water at low heat for 25-30 minutes. Stir from time to time. Drain
Drain the chanterelles. Peel and finely chop the onion. Cut the bacon into fine cubes and fry them crisply in 2 tbsp. oil
Fry the onion and chanterelles briefly. Deglaze with 3⁄8 l water and bring to the boil. Stir in broth, vinegar, mustard and 3-4 tbsp. oil. Season to taste with salt, pepper and sugar. Cut potatoes into slices and mix in with the lentils. Cover and let stand for at least 2 hours.
Wash the chives, cut into small rolls and mix into the salad. Season to taste with salt and pepper