Cook the plate-lentils in boiling salted water for about 45 minutes. Wash potatoes and cook in boiling water for about 20 minutes. Cook red lentils in boiling salted water at low heat for 10-12 minutes. Lentils may need to be drained. Cut the bacon into pieces and leave them crispy in a pan without fat.
Clean and wash the leek and cut into fine rings. Steam in bacon fat for about 2 minutes. Cut Cabanossi into slices. Quench potatoes cold, peel and slice. Put lentils, potatoes, bacon, leek and sausage in a bowl and mix. Peel and finely chop the onion. Heat oil in a pot and fry the onion in it. Deglaze with broth and bring to the boil. Remove the pot from the stove. Wash parsley, dab dry, pluck leaves from the stalks and chop finely.
Heat oil in a pot and fry the onion in it. Deglaze with broth and bring to the boil. Remove the pot from the stove. Wash parsley, dab dry, pluck leaves from the stalks and chop finely. Add parsley and vinegar to the stock and season with salt and pepper. Pour over the salad and let it steep a little. Season again and arrange on a plate