Bibim Sauce
Pickle Sauce
Step 1 to 3 can be done ahead of time (i.e. a day before noodle assembly). This helps develop more flavour in the sauce and keep them chilled longer. Also, it makes the workload “seem lighter” as the work is done over 2 days.
A classic version of bibim naengmyeon sauce is made with beef brisket broth or bone broth. However if you have a particular dietary requirement, you can skip the meat/broth together. Just use water. Though I find that sauce made with broth gives more depth of flavour and it is less spicy than the sauce made with water.
Any leftover broth can be used for other Korean cooking. It’s particularly suitable as a soup base.