Tofu Marinade: Mix the sweet soy sauce, soy sauce, smoked bell pepper and finely chopped garlic in a large bowl.
Add the tofu and make sure that the slices are completely immersed in the marinade.
Let the tofu marinate while you prepare the Bao Buns (about 1 hour).
Bao Bun: Heat the soy milk to lukewarm and dissolve the dry yeast in it. Let this mixture stand for 5 minutes.
Meanwhile, mix the flour, cornflour, salt and baking powder in a large bowl.
Add the soy milk with yeast to the dry ingredients and mix until smooth and homogeneous dough.
Cover the dough with plastic wrap and let it rest for 15 minutes.
Divide the dough on a floured worktop into 6-8 pieces, depending on the desired size of the Bao Buns.
Roll each piece of dough into a thickness of approximately 8 mm. Brush the top with vegetable oil and fold them in half.
Let the Bao Buns rise for 5 minutes before steaming them for 10 minutes.
Tofu Preparation: Heat a frying pan over medium heat and fry the marinated tofu slices golden brown on both sides. Save a little of the marinade to add when serving.
Serve: Carefully open the steamed Bao Buns and fill them with the baked tofu.
Add a bit of the remaining marinade for extra taste.
Garnish with spring onion and coriander.