Wash the cucumber and duck thoroughly, then slice them thinly.
Spread a sheet of kimbap seaweed on a cutting board and evenly layer thin rice over it.
Place duck slices, cucumber strips, pickled radish, and shredded carrots on top of the rice.
Sprinkle a suitable amount of salt and sesame oil over the ingredients.
Roll up the kimbap tightly.
Slice into bite-sized pieces.