Grilled Cajun-Spiced Chicken Sandwich with Pickled Onions

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A smoky grilled chicken sandwich featuring a bold Cajun spice rub and tangy quick-pickled red onions for a perfect balance of heat and acidity. This american-inspired sandwiches & wraps ready in about 25 minutes pairs olive oil, Cajun seasoning, red onion, thinly sliced for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 480 calories and feeds 2, 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: 10 min Cook: 15 min Serves 2 American cuisine 480 cal/serving
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Ingredients

Instructions

  1. Step 1: Combine 1/4 cup white vinegar, 1 tbsp sugar, 1/4 tsp salt, and 1/2 cup thinly sliced red onion in a small bowl. Stir well and let sit at room temperature for 20 minutes to quick-pickle.
  2. Step 2: Rub 2 boneless skinless chicken breasts (6 oz each) evenly with 2 tbsp olive oil and then coat thoroughly with 2 tbsp Cajun seasoning.
  3. Step 3: Preheat grill or grill pan to medium-high heat (about 400°F). Grill chicken breasts for 5-6 minutes per side, until internal temperature reaches 165°F and juices run clear.
  4. Step 4: While chicken cooks, lightly toast 2 sandwich buns on the grill until golden, about 1 minute per side.
  5. Step 5: Spread 1 tbsp mayonnaise on the bottom half of each toasted bun. Layer 2 lettuce leaves, 2 tomato slices, one grilled chicken breast, and a generous spoonful of pickled red onions on each.
  6. Step 6: Top with the bun crowns and serve immediately with your favorite side.

Equipment for this recipe

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Frequently asked questions

How long does Grilled Cajun-Spiced Chicken Sandwich with Pickled Onions 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 Grilled Cajun-Spiced Chicken Sandwich with Pickled 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 olive oil from drying out.

Can I substitute ingredients in Grilled Cajun-Spiced Chicken Sandwich with Pickled 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 Grilled Cajun-Spiced Chicken Sandwich with Pickled Onions for a different number of people?

The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). 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 Grilled Cajun-Spiced Chicken Sandwich with Pickled Onions?

American sandwiches & wraps 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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