1. Put carrots, onions, bouquet garni, and lentils in a pressure cooker, cover with water, lightly salt and pepper. Cook under pressure for about 15 to 20 minutes.
2. If necessary (some butchers provide already desalted meat), desalt the meat (soak it in cold water for 2 hours, changing the water occasionally). Drain it. Put it in a large pot, cover with water, and pepper. Cook at a simmer for two hours.
3. Peel the carrots and onions. Insert the cloves into the onions.
4. At the end of the meat cooking time, remove it from the pot, drain it, and cut it into large pieces. Put these pieces, as well as the sausages previously pricked with a fork, into the pressure cooker already containing the lentils. Add 2 glasses of the broth from the pot (to give the meat flavor).
5. Cook (without pressure, with the pressure cooker open) for 20 to 30 minutes over low heat, being careful not to let the lentils stick.