Pepper Steak with Bell Peppers and Onion

Ingredients

• 1 1/2 pounds flank steak, thinly sliced
• 1 tablespoon vegetable oil
• 2 tablespoons soy sauce
• 2 teaspoons cornstarch
• 1 tablespoon oyster sauce
• 1 tablespoon Worcestershire sauce
• 1 tablespoon minced garlic
• 2 tablespoons minced fresh ginger
• 1 red bell pepper, sliced into strips
• 1 green bell pepper, sliced into strips
• 1 large onion, thinly sliced
• 1/4 cup beef broth
• 1/2 teaspoon black pepper
• Cooked white or brown rice, for serving