Steam the bao buns and spread one half of the bun with 2 teaspoons of the BBQ sauce before filling with your choice of meat (roasted pork belly works a treat), or a vegetarian option such as tofu or roasted pumpkin. Top with shredded carrot, cabbage, red onion, herbs and chilli then drizzle over a teaspoon or so of the tangy dressing before folding together and serving.