Preheat oven to 400 degrees. Season halibut fillets on both sides with salt and pepper. In an ovenproof skillet, heat olive oil over medium heat. Lay in fillets and scatter grapes all around.

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.

Brill is available both whole and in fillets, usually fresh. The best time to buy brill is from June to February. Brill is usually gutted upon landing. Cook brill as you would a halibut ...