Herring (Silke) and Tomato Sauce

Soak salt herring overnight in plain water, in the fridge.

Drain water. If herring is very salty, you may have to re-soak a few times.

Remove herring skin and bones. Slice.

Make a sauce of vegetable oil and onions--cook until soft.

Add tomato ketchup to taste.

Pour tomato/oil sauce over herring and serve.