Super-Simple, Super-Spicy Mongolian Beef

Ingredients

• 0.25 cups soy sauce
• 1 tablespoon hoisin sauce
• 1 tablespoon sesame oil
• 2 teaspoons white sugar
• 1 tablespoon minced garlic
• 1 tablespoon red pepper flakes , Optional
• 1 pound beef flank steak , thinly sliced
• 1 tablespoon peanut oil
• 2 large green onions , thinly sliced

Instructions

1. 1

   Whisk together soy sauce, hoisin sauce, sesame oil, sugar, garlic, and red pepper flakes in a large bowl. Toss beef with marinade; cover the bowl and refrigerate for 1 hour to overnight.

2. 2

   Heat peanut oil in a wok or large, nonstick skillet over high heat. Cook and stir green onions in hot oil for 5 to 10 seconds. Remove beef from marinade and add to green onions in the wok; discard marinade. Cook and stir until beef is no longer pink and begins to brown, about 5 minutes.