Prepare lettuce, tuna, and other ingredients as needed
Slice the lettuce into bite-sized pieces
Lightly sauté the tuna in a pan or use as is
Put rice into a bowl and top with lettuce
Add the tuna on top of the lettuce
Drizzle with mayonnaise, soy sauce, or your preferred sauce
Finish by sprinkling seaweed flakes or sesame seeds as desired