BBC Food - Recipes - Rhubarb and sultana chutney with mackerel, homemade blinis and pickled shallots

Ingredients

• 200ml/7fl oz white wine vinegar
• 75g/2½oz caster sugar
• 1 tsp salt
• ½ tsp black peppercorns
• 2 banana shallots , peeled and thinly sliced
• 150g/5½oz plain flour
• 14g fresh yeast
• 150ml/5fl oz milk
• 2 free-range egg whites
• olive oil , for frying
• 25g/1oz sultanas
• few sprigs fresh rosemary
• 2cm/¾in piece root ginger , peeled and finely chopped
• 1 shallot , peeled and finely chopped
• 3 sticks rhubarb , chopped
• 5 tbsp cider vinegar
• 1 orange , juice only
• salt
• black pepper
• 8 mackerel fillets
• rapeseed oil , for cooking
• 200g/7oz crème fraîche
• 3 tbsp finely chopped fresh chives