1.Heat a wok over medium-high heat. Add peanut oil, onion, carrot, celery, garlic and ginger; stir-fry for 5 minutes or until just softened.
2.Add mince, stir-fry for 5 minutes, breaking up any lumps, or until browned. Stir in sesame oil and sauces; cook for 3 minutes or until syrupy and heated through. Cool for 10 minutes; stir in half the green onion.
3.To serve, spoon mixture into lettuce cups; top with peanuts, remaining green onion and coriander.