Herrings with Caper Stuffing recipe | Delia Smith

Ingredients

• 4 herrings (about 8 oz/225 g each), gutted
• 1 oz (25 g) butter
• 3 oz (75 g) fresh white breadcrumbs
• 1 level teaspoon mustard powder
• 3 level tablespoons finely chopped parsley
• zest of 1 lemon, finely grated
• juice of ½ lemon
• 1 level tablespoon capers, rinsed, patted dry and chopped
• 1 medium onion, finely chopped
• salt and freshly milled black pepper