Shred green cabbage as fine as possible, preferably on a slicer or mandolin
Mix all ingredients in a bowl. The salt will make the cabbage lose its juices, that’s what you want!
Place into a jar and set in a dry dark place. Every couple of days open jars to release gas. After about 2 weeks the cabbage will be ready. It’s okay if it has a fizz to it that’s part of the fermentation process. Then store it in the refrigerator.
Dumplings
Chop brisket and set aside
Mash boiled potatoes with cotija cheese and heavy cream until smooth. Season with salt and white pepper to taste. Place in a piping bag or ziplock bag
Roll out pasta dough (if using homemade pasta dough). If using wonton wrappers, you need egg wash to seal the edges.
Place about 1 tbsp of chopped brisket in the middle of the dough and top with another tablespoon of potato. Lay another sheet of dough on top and seal with a fork, ravioli maker, scalloped pasta cutter, o just press with fingers.
Cook in pot of boiling salted water for about 5 minutes.
Strain, place into serving bowls
Ladle your favorite hot broth or stock over the dumplings and top each with sauerkraut.