Heat the canola oil / sesame oil in a pot over low-medium heat
Add chopped onion, garlic, ginger and cabbage. Stir well and cook for about 3-4 minutes or unil the cabbage becomes soft
Then, add the chopped mushrooms and spring onion and let everything cook for another minute
After about 1 minute add all of the other ingredients (salt, flour, dark soy sauce, apple cider vinegar,brown sugar). Give it a good stir and cook for 5 minutes
Add a bit more salt if needed and start filling your dumplings
Enjoy!
After steaming the dumplings, I love to add a chili broth on top. For ca. 26 dumplings you'll need 100ml vegetable broth, 1 tbsp. sesame oil or canola oil and 1 tsp. chili flakes. Give everything a good stir and start drizzling it on top of your hot dumplings :-)
Tip: Chop all your veggies in a food processor to save time