How to cook perfect oysters Rockefeller

Give the salty half-shell favourites a deluxe Christmas upgrade. But what is the secret to recreating the original New Orleans greens?For those of us smitten with their saline charms, oysters are one of few foodstuffs immediately evocative of celebration. Whether borne aloft through a noisy restaurant on a silver platter, or slurped from the shell on a pebbly beach, they scream special occasion – yet even among their many fans, they remain an occasional treat in Britain, despite the fact o