Jams And Pickles - Pickled Rollmop Herrings

Ingredients

• 8 herring fillets de-scaled
• 300 ml water
• 200 ml white wine vinegar
• 50 g salt
• 1 tbsp caster sugar
• 1/2 onion med thinly sliced
• 1/2 tsp wholegrain mustard
• 8 black peppercorns
• 8 cloves
• 8 allspice berries
• 2 bay leaves