Sautéed Beef Strips with Bell Peppers and Garlic Herb Sauce

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

Tender strips of beef quickly sautéed with colorful bell peppers and finished with a vibrant garlic and herb sauce for a satisfying Whole30 dinner. This mediterranean-inspired whole30 (gluten free) ready in about 25 minutes pairs sirloin steak, red bell pepper, yellow bell pepper for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 360 calories and feeds 4, so it slots cleanly into a Whole30 week and pairs well with roasted sweet potato or a simple olive-oil salad. 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: 15 min Serves 4 Mediterranean cuisine 360 cal/serving
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Ingredients

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Instructions

  1. Step 1: Heat 2 tbsp olive oil in a large skillet over medium-high heat until shimmering. Add 1 lb thinly sliced sirloin steak, seasoned with 1/2 tsp salt and 1/4 tsp black pepper. Sauté for 3-4 minutes, stirring occasionally, until beef is browned but still tender. Remove beef from skillet and set aside.
  2. Step 2: In the same skillet, add 1 tbsp olive oil and the sliced 1 large red bell pepper and 1 large yellow bell pepper. Cook over medium heat for 5-6 minutes until peppers are softened and slightly charred at edges.
  3. Step 3: Add 5 minced garlic cloves, 1/2 tsp salt, 1/4 tsp black pepper, and 1/4 tsp crushed red pepper flakes (if using) to the peppers. Sauté for 1 minute until fragrant.
  4. Step 4: Return the cooked beef to the skillet and stir in 1 tbsp red wine vinegar and 1/4 cup chopped fresh parsley. Toss everything together and cook for an additional 1-2 minutes until heated through and the sauce coats the beef and peppers.
  5. Step 5: Serve hot as a Whole30-compliant main dish.

Frequently asked questions

How long does Sautéed Beef Strips with Bell Peppers and Garlic Herb Sauce take to make?

Total time is about 25 minutes (10 min prep + 15 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 Sautéed Beef Strips with Bell Peppers and Garlic Herb Sauce?

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 sirloin steak from drying out.

Can I substitute ingredients in Sautéed Beef Strips with Bell Peppers and Garlic Herb Sauce?

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 Sautéed Beef Strips with Bell Peppers and Garlic Herb Sauce 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 Sautéed Beef Strips with Bell Peppers and Garlic Herb Sauce whole30?

Yes — this recipe is tagged whole30, gluten free, dairy free, paleo based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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