Canned tuna mixed with mayo, tucked into seasoned rice, rolled up in seaweed with a handful of vegetables — tuna kimbap is one of the most common ways Koreans fill a roll of gimbap. It's called chamchi kimbap (칺췚각미) at home, and it shows up everywhere from packed lunches to picnic baskets.

The tuna filling itself barely changes across kitchens: drained tuna, a spoonful of mayonnaise, salt and pepper. What surrounds it is where cooks take their own path — some keep it simple with just cucumber, others build it out with egg, carrot, spinach, crab sticks, or pickled radish.

Tuna kimbap is just one shape in the kimbap family — try the convenience-store-style Korean Triangle Kimbap or hand-formed Korean Rice Balls (Jumeokbap) next.