For the lentils, put the lentils in cold water and boil until soft. Prepare a roux with 100 g of bacon cut into small pieces and 50 g of flour.
Add the finely chopped onion, chopped parsley, a little garlic, grated lemon peel, chopped capers and 2 chopped anchovy fillets.
Deglaze with a little beef broth and pour the lentil water. Roast everything well and cook together with the lentils. The lentils must remain whole.
Season the lentil vegetables with a few drops of vinegar, lemon juice, a pinch of sugar, salt and pepper.