Fillet, skin and portion the fish
Mix the dredging batter ingredients until smooth
Coat the fish in the batter, then press into panko crumbs until well coated
Place on a wire rack over a tray and bake at 180°C for 12–15 minutes, until just cooked through
Top with cheese and return to the oven for 1 minute to melt
Mix together the tartar sauce ingredients
Warm or toast the brioche buns, then assemble with the fish and a generous spoon of tartar sauce
