Boil the egg hard for about 10 minutes. Peel onion, ginger and garlic and chop finely. Heat the oil in a pot. Sauté the vegetables in it, dust with curry. Deglaze with chunky tomatoes and broth.
Season soup with salt and pepper. Quench egg and peel. Wash spring onion, dab dry, clean and cut diagonally into rings. Cut egg into cubes. Arrange the soup in a bowl, draw streaks in the soup with the yoghurt and sprinkle with egg and spring onion.