Drain the tofu and cut into rhombs. Mix soy sauce, lime juice and Sambal Oelek and marinate the tofu in it for about 1 hour. Clean and wash the carrots, peppers and Chinese cabbage. Cut carrots, except one for garnishing, into fine sticks, peppers into lozenges and Chinese cabbage into strips.
Clean the mushrooms, possibly halve the larger ones. Bring the stock to the boil. Add the carrots, peppers and mushrooms and cook over medium heat for about 8 minutes. Drain the tofu (collect the marinade) and add it to the soup with the Chinese cabbage 3 minutes before the end of the cooking time.
Finally season with the marinade. Serve garnished with a "carrot blossom".