Peel the carrots and cut into slices. Chop the tomatoes in a blender.
Heat the oil in a saucepan and stir-fry the onions first, then the cloves of garlic and ginger. Then pour in the carrots and fry them for a few minutes, stirring again and again. Cover everything with the mixed tomatoes and fill up with vegetable stock. Simmer the soup at a reduced temperature until the carrots are tender. Puree everything with a hand blender, add salt if necessary.