Swedish pickled herring

Preparation time
overnight

Cooking time
less than 10 mins

Serves
Serves 6–8

Ingredients

  • 500ml/18fl oz white wine vinegar
  • 200g/7oz caster sugar
  • 2 bay leaves
  • 1 carrot, peeled and roughly chopped
  • 1 onion, thinly sliced
  • 2 tsp whole black peppercorns
  • 1 tsp yellow mustard seeds
  • 10 salted herring fillets (about 1.3kg/3lb) rinsed, soaked in water overnight, drained
  • red onion, finely chopped, to garnish
  • handful chives, finely chopped chives, to garnish

For the caper butter sauce

  • 110g/4oz unsalted butter
  • handful capers
  • 1 tbsp finely chopped dill
  • ½ lemon, juice only
  • salt and freshly ground black pepper
  • 8 slice rye bread, buttered