Remove any fat from beef. Slice across the grain into long thin strips, about 5-8 cm long.
Place oil ina wok. swirl around to coat bottom and sides, and place over a medium heat. Add onion and garlic, stir-fry using a wooden spoon or flat wooden spatula, for 1 minute.
Add half the beef, stir-fry for 1 minute. Add remaining half of beef and the ginger, stir-fry for another minute, Add carrots, stir-fry for 4 minutes.
Add sweet chilli sauce, fish sauce and lime juice. Bring to the boil, then reduce heat to low and simmer for 3 minutes. Stir in shallots, snow peas and coriander and simmer for 1 further minute. Serve