Angela Hartnett's flagship, Michelin-starred restaurant serves up exquisite Italian food but at a price. Happily, the set menu brings it down to most people's budgets. A vegan set lunch is available too. Smeared with a layer of Warkop's Bazzinga sauce of housemade chilli paste, fried shallots, spring onion, tarragon and dill, it's a great deal fa