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A wedge of ciabatta steak sandwich with balsamic onions and arugula.
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5 from 1 vote

Steak Sandwiches with Balsamic Onions

This Ciabatta Steak Sandwich with Balsamic Onions is an absolutely delicious and affordable way to have a steak dinner at home! Caramelized onions with balsamic vinegar, fresh arugula and basil, goat cheese, and thinly sliced steak are piled on toasty ciabatta bread for an incredible sandwich night everyone will love!  It's all cooked in a cast iron skillet and ready in just 25 minutes!
Prep Time5 minutes
Cook Time20 minutes
Total Time25 minutes
Course: Dinner
Cuisine: American
Servings: 3 to 4
Calories: 735kcal

Equipment

  • cast iron skillet

Ingredients

  • 1 loaf ciabatta bread sliced open and drizzled with olive oil
  • 1 pound sirloin steak
  • ½ teaspoon kosher salt
  • 10 grinds fresh black pepper
  • 1 Tablespoon olive oil
  • 1 red onion sliced
  • 3 Tablespoons balsamic vinegar
  • 1 teaspoon honey
  • 4 ounces goat cheese
  • 1 cup arugula
  • ¼ cup basil leaves to garnish

Instructions

  • Preheat oven to 400°. Slice open the ciabatta bread, drizzle the cut sides with olive oil, and bake for 10 minutes. You can bake it right on the oven rack, no need for a pan.
  • Meanwhile, preheat a cast iron skillet on the stovetop over medium high heat. Season the steak on all sides with salt and pepper.
  • Add olive oil to the hot skillet and sear the steak on one side, about 3 to 5 minutes.
  • Flip the steak and add the sliced onion to the skillet around it. Season the onions with a pinch of salt and pepper. Cook the onion and second side of the steak together, another 3 to 5 minutes. Check the steak with a thermometer, the internal temperature should be 120° to 130° for medium rare.
  • When the steak is done, remove it to a cutting board to rest for 10 minutes. Turn the burner to low or medium low and add the balsamic vinegar and honey to the cooking onions, it will sizzle when it hits the hot pan! Continue cooking and stirring the onions, about 10 minutes while the steak rests.
  • Thinly slice the steak against the grain, discarding any fatty pieces. Assemble the sandwiches on the toasted ciabatta spread with goat cheese and piled with sliced steak, honey balsamic onions, arugula and chopped basil. Cut into triangle wedges and serve.

Notes

  • Make sure your skillet is hot before adding the steaks to get a good sear.
  • Pre-measure your ingredients!  Once you start cooking the steaks, the whole process goes quickly and you don't want to overcook the steak!
  • The cooking time will vary depending on the thickness of your steak.  Start with 3 minutes per side and use a thermometer to check unless you are good at checking doneness by feel!
  • Let the steak rest before slicing.

Nutrition

Calories: 735kcal | Carbohydrates: 81g | Protein: 54g | Fat: 21g | Saturated Fat: 9g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 8g | Cholesterol: 110mg | Sodium: 1356mg | Potassium: 675mg | Fiber: 3g | Sugar: 6g | Vitamin A: 673IU | Vitamin C: 4mg | Calcium: 137mg | Iron: 4mg