In the ancient canal city of Yangzhou, there is a dish that looks like a giant, fluffy meatball but tastes like a cloud of savoury perfection. Known as Crab Meat Lion’s Head (蟹粉狮子头), this legendary Huaiyang cuisine masterpiece has been captivating diners for over 1,400 years – from Sui dynasty emperors to modern-day statesmen.…