Spicy Beef and Broccoli Chow Mein

Name: Spicy Beef and Broccoli Chow Mein
Ingredients: 0.25 cup soy sauce; 2 tablespoons oyster sauce; 2 tablespoons hoisin sauce; 1 tablespoon red wine vinegar; 1 tablespoon sesame oil; 1 tablespoon garlic powder; 1 tablespoon honey; 2 teaspoons chile sauce; 1 teaspoon freshly ground black pepper; 0.5 pound thinly-cut flat iron steaks; 1 cup broccoli florets; 6 ounces dried chow mein noodles; 1 tablespoon olive oil, or more as needed; 0.25 white onion, chopped; 4 cloves garlic, minced, or more to taste