The budget-but-luxe option: Hand-Prepared Whole Seabass, 350g, £4.50 (currently 3 for £10)

Few moments capture the feel of a balmy Mediterranean evening than a whole fish sizzling away on a barbecue. Swerve a last-minute dash to the fishmongers by keeping a few of these “restaurant-sized” seabass in the freezer for impressive outdoor suppers when the weather allows.