- Place lettuce cups onto serving plates.
- Heat oil in a wok; add garlic and onions and stir-fry for 1 min.
- Add pork and oyster sauce; stir-fry for 2 mins. Add water and simmer covered for 1 min.
- Toss in water chestnuts (diced), mushrooms and carrots; stir through Hoisin sauce. Stir-fry for 2 mins and remove mixture from heat.
- Spoon meat mixture into lettuce cups, garnish with spring onions and serve.