Finely chop the kimchi.
Drain the oil from the canned tuna using a sieve.
Add the chopped kimchi and tuna to a pan and stir-fry.
Season with salt and pepper to taste.
Spread a thin layer of keto-friendly rice (such as cauliflower rice) on the gimbap seaweed sheet.
Place the stir-fried tuna and kimchi mixture on top.
Roll tightly to form the gimbap.
Slice into bite-sized pieces.