Add the remaining 1 tablespoon olive oil and heat until shimmering. Add the halibut fillets to the pan and let cook untouched until they begins to release easily from the pan, about 4 minutes.

Allow a 200g/7oz fillet or steak per person. If you can’t find halibut, turbot is a suitable substitute. Small halibut, called chicken halibut, weigh up to 2kg/4½lb and can be bought whole.