Chicken Chow Mein with the Best Chow Mein Sauce (Quick Takeout-Style)

For the Chow Mein:

2 chicken breasts, thinly sliced

8 oz chow mein noodles (or thin spaghetti)

2 cups shredded cabbage

1 cup julienned carrots

3 green onions, sliced

2 tbsp oil (for cooking)

For the Sauce:

1/4 cup low-sodium soy sauce

1 tbsp oyster sauce

1 tbsp hoisin sauce

1 tsp sesame oil

1 tsp sugar

2 cloves garlic, minced

1 tsp cornstarch + 1 tbsp water (slurry)