For a delicious and rich vegetable broth, use more varieties of vegetables. Prepare the vegetables: finely chop the onion and pepper (if fresh), carrot, celery root and tomato, grate on a coarse grater. In a saucepan (~ about 3 liters), in a small amount of vegetable oil, put out the vegetables for 5-7 minutes under the lid, at medium heat, immediately add a little salt and pepper.