Sidae Udong Gimbap is an udon restaurant in Banghak-dong, Seoul. Its udon comes with green onion, red pepper powder, and seaweed flakes in fish cake broth, and the noodles are made and boiled to order. The small shop has a few tables and also serves gimbap, odeng, and jjampong with an octopus tentacle and shellfish. The prices are not low for the portion sizes.