Steam the bao buns, slice into half, and place the tofu, portobellomushroom, and pickled vegetables with mayonnaise in the middle of the bun;place scallion, cilantro and crushed walnuts on top, ready to serve.
*If marinated tofu is not available in your country, you can make your own:
1. Mix Lee Kum Kee Chinese Marinade with water [Ratio: 1:5].
2. Marinate tofu with the marinade.
3. Marinate for 30 minutes and ready to use.