Tuna Lettuce Bowl (excluding rice)

Clean the lettuce, tuna, and onion thoroughly.

Cut the lettuce into bite-sized pieces.

Thinly slice the onion.

Add oil to a pan and stir-fry the onion.

Add the tuna (after removing the oil) to the stir-fried onion and cook together.

Season with soy sauce and pepper.

Place the chopped lettuce in a bowl and top with the sautéed onion and tuna mixture.

Finish by drizzling mayonnaise and sprinkling sesame seeds.