Griddled Ciabatta Steak Sandwich with Caramelized Onions

By AislePrompt Editorial · ·

How this recipe was made — this recipe was drafted by AislePrompt's AI-assisted pipeline from technique templates and USDA-sourced nutrition data, and published by AislePrompt Editorial — see how AislePrompt recipes are developed and reviewed.

A hearty steak sandwich featuring butter-toasted ciabatta rolls, tender seared steak, and sweet caramelized onions for a perfect balance of savory and sweet flavors. This American-inspired sandwich and wrap recipe, ready in about 40 minutes, pairs ciabatta rolls, unsalted butter, sirloin steak for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 650 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: 30 min Serves 2 American cuisine 650 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat a griddle or large skillet to medium heat. Spread 2 tbsp softened unsalted butter evenly on the cut sides of 2 ciabatta rolls and place them buttered-side down on the griddle. Toast for about 3 minutes or until golden brown and warm, then remove and keep warm.
  2. Step 2: In the same griddle, add 1 tbsp olive oil and add 1 medium thinly sliced yellow onion. Cook over medium heat, stirring occasionally, for 15-18 minutes until onions are deeply golden and caramelized. Remove and set aside.
  3. Step 3: Pat 10 oz sirloin steak dry and season both sides with 1 tsp salt, 1/2 tsp black pepper, and 1/4 tsp garlic powder. Increase heat to medium-high and sear steak for 3-4 minutes per side for medium-rare or longer to desired doneness. Remove and let rest for 5 minutes before slicing thinly against the grain.
  4. Step 4: Spread 2 tbsp mayonnaise evenly on the bottom halves of the toasted ciabatta rolls. Layer with 1 cup fresh arugula, the sliced steak, and the caramelized onions. Top with the other halves of the rolls and serve immediately.

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