Stir-Fried Beef with Bell Peppers and Onions
A savory and satisfying keto stir-fry featuring tender beef strips and crisp bell peppers and onions in a rich soy-garlic sauce. This asian-inspired beef (keto, low-carb) ready in about 25 minutes pairs pound flank steak, red bell pepper, green bell pepper for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 350 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. 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
- 1 pound flank steak
- 1 red bell pepper
- 1 green bell pepper
- 1 medium yellow onion
- 2 cloves garlic
- 1 tablespoon sesame oil
- 2 tablespoons soy sauce
- 1/4 teaspoon black pepper
- 1/4 teaspoon salt
Instructions
- Step 1: Heat 1 tablespoon sesame oil in a large skillet over medium-high heat until shimmering.
- Step 2: Add 1 pound thinly sliced flank steak and cook for 3-4 minutes per side until browned, then transfer to a plate and set aside.
- Step 3: Add 1 red bell pepper, 1 green bell pepper, and 1 medium yellow onion to the skillet and stir-fry for 3-4 minutes until vegetables are crisp-tender.
- Step 4: Return the steak to the skillet, add 2 tablespoons soy sauce, 2 minced garlic cloves, 1/4 teaspoon black pepper, and 1/4 teaspoon salt; toss to coat and cook for 1 minute until heated through.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Stir-Fried Beef with Bell Peppers and Onions take to make?
Total time is about 25 minutes (15 min prep + 10 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Stir-Fried Beef with Bell Peppers and Onions?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep pound flank steak from drying out.
Can I substitute ingredients in Stir-Fried Beef with Bell Peppers and Onions?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Stir-Fried Beef with Bell Peppers and Onions for a different number of people?
The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
Is Stir-Fried Beef with Bell Peppers and Onions keto?
Yes — this recipe is tagged keto, low-carb based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
What others are saying
- ★★★★★
Used half the salt and it was still plenty flavorful.
- ★★★★☆
Solid recipe. Not groundbreaking but definitely making it again.
- ★★★★☆
Tasty recipe. I'd add a bit more seasoning next time.
