Ingredients
Method
- Slice the onion into thin rings and pickle it - mine is simple: salt, sugar, vegetable oil, and vinegar.
- Clean the herring and cut it into pieces. I buy ready-made cleaned fillet myself.
- Spread French mustard on slices of Borodinsky bread, add a layer of pickled onion, and top with pieces of herring. Enjoy!

Notes
Make the onion marinade to your own taste - some like it spicier, others sweeter.
