Wash the meat and lentils, place them in a pot and bring them to the boil with 1 1/2 litres of water. Cook for 45-60 minutes. Peel and slice the carrots. Peel turnip and cut into cubes. Add to the lentils after 15 minutes.
Wash the marjoram, shake dry, pluck the leaves from the stalks and chop, except for something to garnish. After 30 minutes, remove the meat, cut into cubes and add back to the soup. Season to taste with marjoram, salt, pepper, vinegar and sugar. Arrange soup in bowls and garnish with marjoram