Preheat oven to 180 fan, place oil and potatoes into oven tray, toss to combine and season, place into oven for 30 minutes, stirring halfway through
Add the chorizo to the pan and the pollock fillets on top, season, return to the oven for 15-20minutes until the fish is cooked through, ‘baste’ using chorizo oil
Serve finished with oregano or parsley