3 herb fish with tartar sauce Recipes

onion, peeled & finely chopped, white wine, cooked cod or 250 g cooked haddock or 250 g cooked whiting fish fillets, etc, mashed potatoes, chopped fresh parsley (or mixture of chopped fresh herbs) or 1 -2 tbsp fresh tarragon (or mixture of chopped fresh herbs) or 1 -2 tbsp fresh dill (or mixture of chopped fresh herbs), salt, pepper, flour , for dusting, egg, beaten, fresh breadcrumbs or dried breadcrumbs, oil (for frying ), bread buns or 4 seeded hamburger buns, lettuce leaf, to serve, tartar sauce

purchased tartar sauce, chopped green onions, chopped fresh thyme, drained capers, good-quality firm white bread , torn into pieces (1 1/2 cups), celery stalk with leaves, cut into 2-inch lengths, boneless cod , haddock, or other white fish fillets, cut into 2-inch chunks, egg, salt, ground black pepper, olive oil, lemon wedges