Chicken Lo Mein

Name: Chicken Lo Mein
Cuisine: Asian, Chinese
Ingredients: 1 lb skinless boneless chicken breasts, very thinly sliced; 3 tbsp cornstarch; Salt; Pepper; 2 tbsp oil; 1 pkg 9 oz lo mein noodles; 1 onion; 12 oz (1/2 bag) frozen broccoli florets; 1 carrot, julienned; 4 oz cremini mushrooms, thinly sliced; 1 garlic clove, crushed; 1/2 cup soy sauce; 3 tbsp oil; 3 tbsp sesame oil; 2 tbsp sugar