Mix canned tuna, onion, pickled radish, ssamjang, and sesame oil with rice, then wrap it with steamed cabbage leaves.
Drain the oil from the canned tuna.
Place ssamjang in a bowl and mix well with the tuna.
Wash the cabbage leaves thoroughly and blanch them briefly in boiling water.
Place a spoonful of tuna ssamjang mixture onto each cabbage leaf.
Roll the cabbage leaves into bite-sized pieces and arrange on a plate.