Secret Ingredient, Better Than Takeout! Beef and Broccoli | Beef Marinade 1 p flank steak - 1 tbs hoisin sauce - 3 tbs soy sauce - 1 tsp Sriracha - 2 tsp cornstarch - ½ tsp garlic pwd - ½ tsp ginger pwd - Sauce: 1 tbs rice wine vinegar or mirin - 2 tbs chicken broth - 5 tbs oyster sauce - 3 tbs brown sugar - 1 tsp sesame oil - 2 tsp cornstarch - ½ tsp salt - ½ tsp pepper - 6 garlic - 1 tbs ginger - ¼ tsp red pepper flakes - 1 tsp peanut oil - 3 ½ - 4 c broccoli - ¼ c water - 3 scallions -