Sizzling Fajitas with Bell Peppers and Onions

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

A vibrant skillet dish featuring marinated strips of beef stir-fried with colorful bell peppers and onions, served sizzling hot. This mexican-inspired beef ready in about 55 minutes pairs thinly sliced flank steak, olive oil, lime juice for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 550 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.

Prep: 40 min Cook: 15 min Serves 4 Mexican cuisine 550 cal/serving
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Ingredients

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Instructions

  1. Step 1: In a bowl, combine 1 lb thinly sliced flank steak with 3 tbsp olive oil, 2 tbsp lime juice, 1 tbsp chili powder, 1 tsp ground cumin, 1 tsp garlic powder, 1 tsp salt, and 1/2 tsp black pepper. Marinate for 30 minutes.
  2. Step 2: Heat a large cast-iron skillet over high heat until smoking. Add the marinated steak strips and sear for 3-4 minutes until browned but still juicy. Remove steak and set aside.
  3. Step 3: In the same skillet, add sliced strips of 1 large red bell pepper, 1 large green bell pepper, and 1 large yellow onion. Sauté for 5 minutes until tender-crisp and slightly charred.
  4. Step 4: Return the steak to the skillet, toss with the vegetables, and cook together for 2 minutes to blend flavors.
  5. Step 5: Sprinkle 1/4 cup chopped fresh cilantro over the mixture and serve immediately with 8 warm flour tortillas for assembling fajitas.

Frequently asked questions

How long does Sizzling Fajitas with Bell Peppers and Onions take to make?

Total time is about 55 minutes (40 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 Sizzling Fajitas 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 thinly sliced flank steak from drying out.

Can I substitute ingredients in Sizzling Fajitas 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 Sizzling Fajitas 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.

What goes well with Sizzling Fajitas with Bell Peppers and Onions?

Mexican beef like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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