Add the pork, carrots, mushrooms, tofu and all other mixture ingredients to a bowl, and mix well by hand until the mixture becomes sticky.
Place about 2/3 tbsp of the mixture onto a shumai wrapper, gathering the edges around, leaving the top open. Place an edamame on top. Repeat to make 14 shumai.
Place the cabbage leaves in a frying pan, then arrange the shumai on top, leaving some space between each.
Pour about 60ml of boiling water into the pan, cover with a lid, and cook over a medium-high heat.
Once it comes back to a boil, reduce the heat to low and steam for 7 minutes until the liquid has almost evapourated.
Serve while warm.
Notes
Note: You can adjust the ratio of pork mince to tofu to your taste.