Prepare the brown rice.
Finely chop the kimchi.
Drain the oil from the canned tuna and set aside.
Stir-fry the kimchi in a pan, then add the tuna and stir-fry together.
Add the seasonings (sesame oil, pepper) and mix well.
Place a sheet of seaweed on a bamboo mat and evenly spread the brown rice over it.
Add the stir-fried kimchi tuna and vegetables on top.
Roll tightly and slice.