Beef and Broccoli Lo Mein

Name: Beef and Broccoli Lo Mein
Prep time: 15 min
Cook time: 10 min
Total time: 25 min
Cuisine: Asian
Ingredients: 1/2 lb beef (flank steak or sirloin), thinly sliced; 2 tbsp soy sauce; 1 tbsp oyster sauce; 1 tsp cornstarch; 1 tsp sesame oil; 1/2 tsp black pepper; 1/4 cup soy sauce; 2 tbsp oyster sauce; 1 tbsp hoisin sauce; 1 tbsp dark soy sauce (for color and depth); 1 tbsp rice vinegar; 1 tbsp brown sugar; 1/4 cup water or chicken broth; 8 oz lo mein noodles (or spaghetti); 2 tbsp vegetable oil; 2 cups broccoli florets; 1 medium carrot, julienned; 1/2 red bell pepper, thinly sliced; 3 cloves garlic, minced; 1 inch piece ginger, minced; 2 green onions, sliced diagonally (for garnish); Sesame seeds (optional, for garnish)