Method:

1. Combine mince, onion, 1/2 the garlic, Oyster sauce, 1/2 the Sesame oil, Soy sauce and egg in a medium bowl until well mixed.
2. Shape 1/4 cup portions into balls, flatten slightly.
3. Heat the rice bran oil in a large frying pan over medium heat.
4. Cook meatballs, in batches, turning, for 4-5 minutes or until golden and cooked through.
5. Transfer to a plate and add remaining garlic and Sesame oil to the frying pan with the capsicum, mushrooms and tomatoes.
6. Stir fry 2-3 minutes or until mushrooms are softened.
7. Return meatballs to pan with watercress and noodles and toss to combine.