Lentil And Tomato Soup

• 2 sticks celery (chopped)
• 2 veg stock (cubes)
• 1 onion (chopped)
• 1 carrot (chopped)
• 1 end
• 1,400 ml boiling water
• 250 gr tomatoes
• 70 gr nutritional yeast flakes
• 30 ml oil
• 6 gr salt at end