Recipes » Main Dish Recipes » Steak Sandwich with Grilled Onions

Steak Sandwich with Grilled Onions

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5 from 1 vote
A delicious steak sandwich served on a chewy ciabatta roll
Prep Time 5 minutes
Cook Time 25 minutes
A luscious Steak Sandwich piled high with grilled onions, a spicy mustard mayo, and arugula on ciabatta bread. A meal all on its own. https://www.lanascooking.com/steak-sandwich/

A luscious Steak Sandwich piled high with grilled onions, a spicy mustard mayo, and arugula on ciabatta bread. A meal all on its own.

This Steak Sandwich with Grilled Onions recipe is based on an older Ina Garten recipe with several tweaks by me. I’ve always cooked so many of her recipes because, well, they’re just downright good. This one is also a meat lover’s delight.

A luscious Steak Sandwich piled high with grilled onions, a spicy mustard mayo, and arugula on ciabatta bread. A meal all on its own. https://www.lanascooking.com/steak-sandwich/

If there’s a meat eater that you want in your life, make them this sandwich and they’ll follow you anywhere. If there’s already a meat lover in your life, make them this sandwich and they’ll think they’ve died and gone to heaven.

BeeBop really loves it (and so do I!). Just be sure to have plenty of napkins on hand when you serve it.

How to Make Steak Sandwich with Grilled Onions

Season the steak liberally with salt and pepper on both sides.

Steak cooking in a cast iron skillet.

Heat 1 tablespoon of olive oil in a medium saute pan over high heat until it’s almost smoking, then sear the steak for about a minute.

Cooking the steak on the second side.

Turn it over and sear the other side for about a minute. The pan should be very hot while you’re searing. I used an iron skillet because it gets really hot and holds the heat for a long time.

Reduce the heat to low and cook the steak for about 7 to 10 minutes for rare, up to 15 minutes for well done.

When the cooking time is finished, remove it to a plate and cover tightly with foil. Allow the steak to rest for 10 minutes while you cook the onions.

Use the same pan without cleaning it out. Just leave all that good brown stuff in there. Heat 1 1/2 tablespoons of olive oil over medium heat.

Cooking onions in a cast iron skillet.

Add the onion and thyme and saute for 10 minutes.

Caramelized onions in a cast iron skillet.

Stir the onions often making sure you turn them over frequently so they all cook evenly and turn a golden, caramel brown.

Slicing the steak on an angle.

To assemble the sandwiches, first slice the steak on an angle.

Closeup view of sliced steak.

And if you can resist popping that one little piece on the end into your mouth, you’re a better woman than I am. Around here that’s called the “Cook’s Treat.”

Bread spread with mustard-mayo.

Spread Mustard Mayo on top and bottom of the bun. Or bread. Or baguette, or whatever you’re using.

Layering steak over bread.

Place a layer of steak strips on the bottom of the bun, sprinkle with salt and pepper.

Onions added on top of the steak.

Top with the caramelized onions.

Onions and steak topped with arugula.

Place baby arugula on top of the onions and cover the sandwich with the top half of the bun.

Finished sandwich on a board.

Just look at that thing. A meat lover’s dream!

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A luscious Steak Sandwich piled high with grilled onions, a spicy mustard mayo, and arugula on ciabatta bread. A meal all on its own. https://www.lanascooking.com/steak-sandwich/

Steak Sandwich with Grilled Onions

A delicious steak sandwich served on a chewy ciabatta roll
5 from 1 vote
Print It Rate It
Course: Main Dishes
Cuisine: American
Prep Time: 5 minutes
Cook Time: 25 minutes
Total Time: 30 minutes
Servings: 2 servings
Calories: 727kcal
Author: Lana Stuart

Ingredients

  • 12 ounces New York strip steak
  • Kosher salt
  • Black pepper
  • Olive oil
  • 2 yellow onions sliced in rings
  • ½ teaspoon fresh thyme leaves
  • 2 sub buns a loaf of French bread, or other rustic bread
  • ½ cup baby arugula

For the Mustard Mayo:

  • cup mayonnaise
  • 2 tablespoons Dijon mustard
  • 1 tablespoon whole-grain mustard
  • 2 tablespoons sour cream
  • teaspoon Kosher salt

Instructions

Make the Mustard Mayo:

  • Stir all ingredients together in a small bowl. Set aside.

For the Sandwiches:

  • Season the steak liberally with salt and pepper on both sides.
  • Heat 1 tablespoon of olive oil in a medium saute pan over high heat until it's almost smoking, then sear the steak on each side for 1 minute.
  • Reduce the heat to low and cook the steak for about 7 to 10 minutes for rare, up to 15 minutes for well done. Remove to a plate, cover tightly with foil, and allow to sit for 10 minutes while you cook the onions.
  • Using the same pan, heat 1 1/2 tablespoons of olive oil over medium heat. Add the onion and thyme and saute for 10 minutes, until the onions are brown and caramelized, stirring occasionally.
  • To assemble the sandwiches, spread Mustard Mayo on top and bottom of the bun. Place a layer of steak strips on the bottom of the bun, sprinkle with salt and pepper and top with the caramelized onions. Place baby arugula on top of the onions and cover the sandwich with the top half of the bun.

Nutrition Information

Serving: 1 | Calories: 727kcal | Carbohydrates: 48g | Protein: 43g | Fat: 40g | Saturated Fat: 13g | Polyunsaturated Fat: 6g | Monounsaturated Fat: 14g | Trans Fat: 1g | Cholesterol: 148mg | Sodium: 1075mg | Potassium: 774mg | Fiber: 4g | Sugar: 11g | Vitamin A: 261IU | Vitamin C: 10mg | Calcium: 109mg | Iron: 14mg

Nutrition information is calculated by software based on the ingredients in each recipe. It is an estimate only and is provided for informational purposes. You should consult your health care provider or a registered dietitian if precise nutrition calculations are needed for health reasons.

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