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+ servings
Sliced steak and caramelized onion ciabatta sandwich

Steak and Caramelized Onion Sandwich

Stacey Doyle
A gorgeous easy to make steak and caramelized onion sandwich that is perfect anytime.
4.86 from 7 votes
Prep Time 5 minutes
Cook Time 30 minutes
Additional Time 1 hour
Total Time 1 hour 35 minutes
Course Dinner
Cuisine American
Servings 4 - 6
Calories 783 kcal

Ingredients
  

  • 2 - 3 pounds flank London broil or skirt steak
  • 2 tablespoons olive oil
  • Salt and pepper to taste
  • 2 - 3 sprigs fresh rosemary chopped well or 2 teaspoons dried rosemary
  • 2 tablespoons unsalted butter
  • 2 tablespoons extra virgin olive oil
  • 2 large onions sliced into 1/4 inch thick slices
  • Salt and pepper to taste
  • 6 bay leaves
  • ¼ cup balsamic or red wine vinegar
  • 1 large ciabatta loaf or 4 - 6 individual ciabatta breads
  • Maille Dijon Originale
  • Arugula or baby lettuce of choice

Instructions
 

  • Rub the meat with the olive oil, chopped rosemary, salt and pepper, place on a foil-lined baking pan. Bring the meat to room temperature for at least 30 minutes or up 2 hours before cooking.
  • To caramelize the onions, in a large skillet over medium-high heat, add the olive oil and butter along with the bay leaves. Once the butter has melted add in the thick-sliced onions, season with salt and pepper, and cook for 3 - 5 minutes.
  • Pour the vinegar into the skillet and turn the heat to low and allow to cook with lid askew for about 20 - 25 minutes or until tender. (Do not turn onions, allow to only cook on one side).
  • Place the rack in the middle of the oven and preheat the oven to 450°F.
  • Roast the meat for about 8 - 9 minutes (about 3 minutes per pound), turn the heat off, leaving the meat in the oven without opening the oven door for 20 minutes for medium-rare or 25 minutes for medium.
  • Remove the meat from the oven, transferring to a cutting board, cover with foil and allow meat rest at room temperature for 10 -15 minutes before slicing thinly.
  • Slice the Ciabatta lengthwise and toast in a dry skillet over medium heat until brown if desired.
  • Spread on Maille Dijon Originale to taste on toasted ciabatta.
  • Top with caramelized onion, sliced meat, and arugula.

Notes

I used red onions in this recipe, but you can use yellow or white onions if preferred.
The caramelized onions can be stored in a sealed container in the refrigerator for up to 3 days.
The roasted meat can be stored covered in an airtight container in the refrigerator for up to 3 days.
The meat can be served cold or warm.

Nutrition

Serving: 1gCalories: 783kcalCarbohydrates: 25gProtein: 60gFat: 47gSaturated Fat: 17gPolyunsaturated Fat: 28gCholesterol: 145mgSodium: 494mgFiber: 2gSugar: 6g
Keyword caramelized onions, dinner, lunch, meat, mustard, sandwiches, steak
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