For the lentil vegetables, rinse the lentils and then simmer them with 2-3 liters of water in a pot for about 40 minutes until they are firm to the bite.
Meanwhile, chop the onion and fry in a little oil. Once the lentils are ready, strain and rinse again briefly. Add to the fried onions and mix well.
Add the spoonful of crème fraîche and season to taste.