In a brightly lit restaurant in downtown Hong Kong, the meaty smell of fried spam fills the air. As other staff prepare for the lunchtime rush, a cook is putting the finishing touches to a bowl of instant noodles, egg and spam, a dish so popular and iconic of local cuisine that it has its own shorthand in Cantonese (chaan daan mihn). But this bowl is different: despite being topped with two pink slabs of luncheon meat, it doesn't actually contain any animal products. The "spam" is vegan, a meat-free alternative developed by OmniFoods, a Hong Kong-based food producer and social enterprise.