Quick Keto Beef Stir-Fry with Broccoli and Bell Peppers

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

A fast and flavorful keto-friendly stir-fry featuring tender strips of beef with crisp broccoli and colorful bell peppers in a savory garlic sauce. This Asian Fusion-inspired keto recipe, ready in about 22 minutes, pairs flank steak, thinly sliced, broccoli florets, red bell pepper, sliced for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 4, 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.

Prep: 10 min Cook: 12 min Serves 4 Asian Fusion cuisine 320 cal/serving
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Ingredients

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Instructions

  1. Step 1: Heat 1 tbsp olive oil in a large wok or skillet over high heat until shimmering. Add 1 lb thinly sliced flank steak and stir-fry for 3-4 minutes until browned but still tender. Remove beef and set aside.
  2. Step 2: In the same skillet, add 2 tbsp sesame oil, then toss in 3 cloves minced garlic, 1/2 tsp ground ginger, and 1/4 tsp red chili flakes. Stir-fry for 30 seconds until aromatic.
  3. Step 3: Add 2 cups broccoli florets and 1 medium sliced red bell pepper. Stir-fry for 4-5 minutes until vegetables are crisp-tender.
  4. Step 4: Return the beef to the skillet and pour in 3 tbsp soy sauce. Toss everything together and cook for another 2 minutes until the sauce slightly thickens and coats the beef and vegetables.
  5. Step 5: Remove from heat and garnish with 2 sliced green onions before serving.

Frequently asked questions

How long does Quick Keto Beef Stir-Fry with Broccoli and Bell Peppers take to make?

Total time is about 22 minutes (10 min prep + 12 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 Quick Keto Beef Stir-Fry with Broccoli and Bell Peppers?

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 flank steak, thinly sliced from drying out.

Can I substitute ingredients in Quick Keto Beef Stir-Fry with Broccoli and Bell Peppers?

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 Quick Keto Beef Stir-Fry with Broccoli and Bell Peppers 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 Quick Keto Beef Stir-Fry with Broccoli and Bell Peppers keto?

Yes — this recipe is tagged keto based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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