My naengmyeon(cold noodle soup) recipe calls for yeolmu mulkimchi.
http://www.maangchi.com/recipe/yeolmu-mulkimchi
http://www.maangchi.com/recipe/naengmyeon
But some people have asked me if they can make delicious naengmyeon without yeolmu mulkimchi because yeolmu (young summer radish) is not available.
Yes, you can still make delicious naengmyeon.
For those who don't have yeolmu mulkimchi but want to have naengmyeon (cold noodle soup)
1. You can make mulkimchi with chinese broccoli, mustard greens, and white radish, too. Radish mulkimchi recipe will be posted soon but you can experiment making your own mulkimchi with different kinds of vegetables.
2. Make chicken or beef broth and add kimchi juice, salt, a little bit of vinegar and sugar : delicious naengmyeon broth!
3. When you buy a package of naengmyeon, it usually comes with a small soup powder packet. Make broth with the powder. Dissolve the powder in about 1/2 cup warm water first and add ice cold water.