On paper a humble state-run restaurant, but in reality a rip-roaring culinary extravaganza, El Aljibe has been delighting both Cuban and foreign diplomats' taste buds for years. The furore surrounds the gastronomic mysteries of just one dish: the obligatory (roast chicken), which is served up with as-much-as-you-can-eat helpings of white rice, black beans, fried plantain, french fries and salad. The accompanying bitter orange sauce is said to be a state secret.