Ingredients for Stir-Fried Chicken with Vegetables:

For the Chicken:

1 large chicken breast, cut into bite-sized pieces
3 tbsp olive oil
1/2 tsp black pepper
1/2 tbsp dark soy sauce

For the Vegetables:

1 large onion, diced
2 cups carrots, diced
2 cups broccoli florets
1 stalk leek, diced
1 cup red bell pepper, diced
1 cup mushrooms, diced
For the Sauces and Seasoning:
1 tbsp sesame oil
2 tbsp light soy sauce
1 tbsp oyster sauce