Heat a drizzle of oil in a pan over medium heat.
Add the minced garlic or shallots and sauté until fragrant.
Add the drained tuna and stir for 1–2 minutes to warm through and lightly toast the tuna.
Add the sliced cabbage and cook until it softens and reduces in volume.
Stir in the ssamjang and mix until the cabbage and tuna are evenly coated.
Finish with a drizzle of sesame oil and sprinkle with sesame seeds.
Serve warm and enjoy!