Mongolian-Style Keto Beef Stir Fry
Quick stir-fried beef strips coated in a savory, slightly sweet keto-friendly sauce packed with umami and Asian flavors. This Asian Fusion-inspired keto recipe (low carb), ready in about 20 minutes, pairs flank steak, sesame oil, soy sauce (tamari for gluten-free) for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 420 calories and feeds 2, so it slots cleanly into a low-carb week and pairs well with cauliflower rice or roasted green vegetables. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 12 oz flank steak
- 2 tbsp sesame oil
- 3 tbsp soy sauce (tamari for gluten-free)
- 1 tbsp erythritol
- 3 minced garlic cloves
- 1 tsp grated ginger
- 2 chopped green onions
- 1/4 tsp red pepper flakes
- 1/2 cup sliced (optional) water chestnuts
- 1/2 tsp salt
- 1/4 tsp black pepper
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Equipment for this recipe
Tools this recipe's steps call for, with a link to each on Amazon.
Instructions
- Step 1: Slice 12 oz flank steak thinly against the grain into 1/4-inch strips and season with 1/2 tsp salt and 1/4 tsp black pepper.
- Step 2: Heat 1 tbsp sesame oil in a large skillet or wok over high heat until shimmering. Add the steak strips in a single layer and sear for 2-3 minutes, stirring frequently until browned but not fully cooked through. Remove steak and set aside.
- Step 3: In the same skillet, add remaining 1 tbsp sesame oil, 3 minced garlic cloves, and 1 tsp grated ginger. Sauté for 30 seconds until fragrant.
- Step 4: Stir in 3 tbsp soy sauce, 1 tbsp erythritol, and 1/4 tsp red pepper flakes. Cook sauce for 1 minute until slightly thickened.
- Step 5: Return the steak strips to the skillet along with 1/2 cup sliced water chestnuts if using, and 2 chopped green onions. Toss everything together and cook for another 1-2 minutes until beef is cooked through and sauce coats all ingredients.
- Step 6: Serve hot as a low-carb main dish.








