Lentils wash, drain. Place the lentils with bay leaf and 2 litres of water in a large pot, cover and simmer for about 45 minutes. Peel and finely dice the onion. Dice the bacon. Clean, peel, wash and chop the carrot. Clean and wash the leek and also cut into small cubes
Drain the lentils and let them drain. Heat the oil in a pot and fry the bacon in it. Sprinkle with flour and stir-fry over medium heat until the flour is golden brown. Add the vegetables and fry. Add lentils to the vegetables, deglaze with meat stock and simmer covered for about 5 minutes
Cook the pasta in boiling salted water according to the instructions on the packet. Season lentils with vinegar, sugar, salt and pepper. Heat up sausages in it. Wash parsley, shake dry, chop finely. Drain the pasta and let it drain. Arrange lentil vegetables, sausages and spaetzle on plates, sprinkle with parsley