Heat the cooking oil in a wok.
Put-in the chicken. Stir fry for 2 minutes.
Add the ginger and garlic. Cook for 30 seconds.
Put-in the chopped mushroom. Season with salt and pepper. Stir-fry for 1 to 2 minutes.
Put-in the chopped water chestnuts, bell pepper, and green onion. Cook for 2 minutes.
Add the orange juice and Hoisin sauce. Stir until all the ingredients are coated.
Arrange the lettuce leaves in a plate. Scoop some mixture in each lettuce leaf.
Serve. Share and enjoy!