Wash and peel the vegetables well. Grate carrots and celery root, leeks on a coarse grater and add corn.
Pour 2-3 tablespoons of sunflower oil into a saucepan (2.5 liters) with a thick bottom, put the prepared vegetables, add salt (the vegetables will quickly let the juice and will not burn) and pepper, simmer on low heat for 7-10 minutes.