Beef Stew with Lentils
Rinse the lentils in cold water and drain. Cut the meat into cubes. Rinse and peel the vegetables. Cut the carrots into slices. Cut the celery into cubes and the celery root into very small cubes. Chop the onions. Cook the diced meat in hot oil, add the onions and cook until soft. Add the vegetables with the lentils and add the beef. Pour in the water and boil. Rinse the herbs, shake dry and chop. Simmer on low heat for about 1 hour.
Before serving, vigorously season with salt, pepper, red wine vinegar and mustard.