Cut fresh mushrooms and onions in to small pieces. I've used portobello mushrooms. Cut the herring. My favourite is matjes. It has so smooth taste and soft texture 😋

Heat some oil, add onions and some sugar. When onions are fried, add mushrooms and mix all well. Add some butter and a little salt. Cook for 10 minutes.

Wait for mushrooms to cool down. Add herring and mix well. Smakelijk eten!