Steps
1. If using raw cod, soak in a salty brine for 24-48 hours to ferment before using.
2. In a bowl, combine the fermented cod fish, fresh spinach, chopped celery, and diced beetroot.
3. Drizzle with olive oil, and season with rock salt and pepper to taste.
4. Gently toss all ingredients together until well mixed.
5. Serve chilled in a glass jar or container for a beautiful presentation.