Prepare seaweed sheets for kimbap.
Spread a thin layer of rice over the seaweed.
Place lettuce on top of the rice.
Slice cucumber, carrot, and pickled radish into long strips and place on top.
Drain the oil from the canned tuna and add it on top.
Add a bit of mayonnaise to your taste.
Roll all the ingredients tightly with the seaweed.
Cut into bite-sized pieces.