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Million Dollar Keto Mongolian Beef - Rich, Savory, and Low-Carb Comfort

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Prep Time 15 minutes
Cook Time 20 minutes
Total Time 35 minutes
Servings: 4 servings
Ingredients Method

Ingredients
  

  • Flank steak (1.5 pounds), thinly sliced against the grain
  • Avocado oil or light olive oil (for high-heat searing)
  • Butter (1 tablespoon, optional for extra richness)
  • Tamari or coconut aminos (1/3 cup; tamari is lower-carb and saltier, coconut aminos is slightly sweeter)
  • Brown erythritol or allulose blend (3–4 tablespoons, to taste)
  • Rice vinegar (1 tablespoon) or apple cider vinegar
  • Garlic (4 cloves), minced
  • Fresh ginger (1 tablespoon), finely grated
  • Red pepper flakes (1/2–1 teaspoon), optional
  • Beef broth (1/4 cup), preferably low-sodium
  • Xanthan gum (1/4 teaspoon) or glucomannan, as a keto thickener
  • Green onions (4–5), sliced on the bias
  • Sesame oil (1 teaspoon), for finishing
  • Sesame seeds, for garnish
  • Salt and pepper, to taste
  • Optional sides: steamed broccoli, cauliflower rice, or shredded cabbage

Method
 

  1. Prep the steak: Pat the flank steak dry with paper towels. Slice it thinly against the grain, about 1/4 inch thick. Season lightly with salt and pepper.
  2. Make the sauce base: In a small bowl, whisk together tamari or coconut aminos, brown erythritol, rice vinegar, and beef broth. Set aside.
  3. Heat the pan: Use a large skillet or wok over medium-high heat. Add 1–2 tablespoons of avocado oil and let it shimmer.
  4. Sear in batches: Add a single layer of steak to the hot pan. Cook 1–2 minutes per side until the edges get crispy and browned but the centers stay tender. Remove to a plate and repeat with remaining steak, adding more oil if needed.
  5. Sauté aromatics: Drop heat to medium. Add butter (if using), then the minced garlic and grated ginger. Cook 30–45 seconds until fragrant, stirring constantly so they don’t burn.
  6. Add the sauce: Pour in the sauce mixture. Bring to a gentle simmer, stirring to dissolve the sweetener. Taste and adjust sweetness or salt as needed.
  7. Thicken smartly: Sprinkle in xanthan gum while whisking to avoid clumps. Start with 1/8 teaspoon, then add a pinch more if needed. Simmer 1–2 minutes until the sauce turns glossy and lightly coats a spoon.
  8. Combine: Return the seared steak (and any juices) to the pan. Toss to coat every slice. Add red pepper flakes if you want heat. Simmer 1 minute to marry flavors.
  9. Finish: Stir in half the green onions and the sesame oil. Kill the heat and let everything sit for 1–2 minutes to relax and thicken slightly more.
  10. Serve: Plate with steamed broccoli, cauliflower rice, or sautéed cabbage. Garnish with remaining green onions and sesame seeds. Enjoy immediately.