Costco takes on rival Trader Joe's by offering popular frozen dish for sale

Costco has begun selling a Korean frozen dish so popular that it often flies off the shelves of another major grocer.

Kimbap, similar to sushi, consists of rice and various ingredients wrapped in seaweed. The item has been a popular feature at Trader Joe's, often selling out.

Costco, filling the void, now has Hanwoomul's fried tofu and vegetable kimbap pre-sliced rolls listed as a "new" item on its website. 

The rolls, which come six to a bag, can be found in the frozen foods section of Costco warehouse stores.