01 - Preheat oven to 400°F. Line a baking tray with parchment paper or lightly grease a baking dish.
02 - Pat haddock fillets dry with kitchen paper and place them on the prepared tray, spacing them evenly with adequate space between each fillet.
03 - In a mixing bowl, combine breadcrumbs, lemon zest, parsley, chives, thyme, garlic, salt, and pepper. Drizzle melted butter and olive oil over the mixture and stir with a fork until evenly moistened with a crumbly texture.
04 - Distribute lemon and herb crumb mixture evenly over the top of each haddock fillet, pressing gently to ensure the topping adheres properly.
05 - Bake in the preheated oven for 15-18 minutes until the fish is opaque, flakes easily with a fork, and the crumb topping is golden brown.
06 - Transfer to serving plates immediately and serve with lemon wedges on the side.