Creative juices  Artist Marc Quinn and his wife, the brilliant
children's author Georgia Byng, deploy their talent in the
service of home cooking. By Dominic Lutyens  It's always
fascinating to see whether an artist's work has anything in
common with their taste in interiors; and even whether there's
any connection between their art and their taste in food. When I
first meet Marc Quinn at his north-London home, he's beating
eggs in a food processor for a chocolate, ginger and black-grape
cake (his own concoction) in a kitchen featuring expanses of
pristine white marble he says he designed himself.  According to
his wife Georgia Byng (author of the Molly Moon children's book
series) it was more a case of him 'stipulating how the kitchen
should look' when they hired an architect. But the use of marble
for all the work surfaces in their white-walled kitchen-cum-
dining room basement is interesting, because white marble
happens to be one of Marc's favourite art materials. It was
Quinn who controversially perched h