Savory Mongolian Beef Noodles

Ingredients (Serves 4)

• The Beef & Marinade:
  • 1 lb flank steak or sirloin steak, sliced thinly against the grain into bite-sized strips
  • 1 tbsp cornstarch (the secret to getting that velvety restaurant texture)
  • 1 tbsp low-sodium soy sauce
  • 1 tbsp vegetable oil or avocado oil
• The Noodles & Veggies:
  • 8 oz lo mein noodles, chow mein noodles, or even standard spaghetti/fettuccine (cooked according to package directions)
  • 4 cloves garlic, minced
  • 1 tbsp fresh ginger, finely grated
  • 1 bunch green onions (scallions), cut into 2-inch pieces (separate the white and green parts)
• The Savory Mongolian Sauce:
  • $\frac{1}{3}$ cup low-sodium soy sauce
  • $\frac{1}{3}$ cup water or low-sodium beef broth
  • $\frac{1}{3}$ cup dark brown sugar (packed)
  • 1 tbsp sesame oil
  • $\frac{1}{2}$ tsp red pepper flakes (optional, for a gentle heat)
  • 1 tsp cornstarch mixed with 1 tbsp cold water (for thickening)

Step-by-Step Instructions

1. Velvety Beef Prep:
   • In a bowl, toss the sliced steak with 1 tbsp soy sauce and 1 tbsp cornstarch until every piece is lightly coated. Let it sit for 10 minutes (this locks in juices and gives the beef an incredible tender texture).
2. Mix the Sauce:
   • In a measuring cup, whisk together the soy sauce, water (or beef broth), brown sugar, sesame oil, and red pepper flakes. Set aside.
3. Sear the Beef:
   • Heat 1 tbsp of oil in a large skillet or wok over high heat. Add the beef in a single layer, letting it sear undisturbed for 1 to 2 minutes to get a nice caramelized crust, then stir-fry for another minute until just cooked through. Remove the beef from the pan and set it aside on a plate.
4. Aromatics & Sauce Simmer:
   • In the same skillet over medium heat, add a splash of oil if needed. Toss in the minced garlic, grated ginger, and the white parts of the green onions. Cook for 30 seconds until fragrant.
   • Pour in the liquid sauce mixture and bring it to a gentle bubble. Stir in your cornstarch-water slurry and let it simmer for 2 minutes until the sauce thickens into a glossy, coating glaze.
5. Toss It All Together:
   • Add your cooked noodles and the seared beef (along with any resting juices) directly into the skillet.
   • Toss everything vigorously over medium heat until the noodles are thoroughly coated in the rich Mongolian sauce and heated through.
6. Garnish and Serve:
   • Turn off the heat and stir in the remaining fresh green onion tops. Serve immediately while piping hot!

Pro Tip: Slicing the beef against the grain (perpendicular to the direction the muscle fibers run) shortens the fibers, ensuring every single bite of steak is tender and melts in your mouth.