Cut the chuck flap steak and cabbage into bite-sized pieces.
Blanch the cabbage leaves in boiling water and let them cool.
Place a piece of chuck flap steak on the blanched cabbage and roll it up tightly.
Arrange the cabbage rolls neatly in a pot.
Pour the sauce (soy sauce, sugar, minced garlic, water) over the rolls.
Cover with a lid and steam over medium-low heat for 15 minutes.
Plate the rolls and drizzle with sauce to finish.