method
1. Melt 15 g (1/2 oz) of the butter in a saucepan, add the onion and fry gently for about 5 minutes, until softened, stirring occasionally.
2. Meanwhile, mix together the breadcrumbs, walnuts, mustard, lemon rind, 15 ml (1 tbsp) lemon juice and mixed herbs. Season to taste. Add the onion and mix together well.
3. Open the herring fillets and lay skin side down. Press the stuffing mixture evenly over each fillet. Fold the herring fillets back in half and slash the skin several times.
4. Melt the remaining butter in a large frying pan, add the fish and fry for about 10 minutes, turning them once, until they are tender and browned on each side.
serving amount
serves 4
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