Combination Chow Mein

Name: Combination Chow Mein
Ingredients: 100 g pork, diced; 1 teaspoon Chinese five spice powder; 1 tablespoon hoisin sauce; 1 tablespoon soy sauce; 2 tablespoons peanut oil; 12 medium prawns, uncooked (or shrimp); 250 g chicken breasts, diced; 1 medium carrot, sliced thinly; 1 medium brown onion, sliced thinly; 2 medium celery ribs, sliced thinly; 1 medium red capsicum, sliced thinly (bell pepper); 1⁄2 cup button mushroom, sliced thinly; 1⁄2 cup chicken stock; 1 tablespoon cornflour; 2 tablespoons light soy sauce; 2 tablespoons oyster sauce; 2 bok choy, sliced; 1 cup bean sprouts; 3 green onions