Steak Sandwich with Grilled Onions

Name: Steak Sandwich with Grilled Onions
Prep time: 5 min
Cook time: 25 min
Total time: 30 min
Yield: 2 servings
Ingredients: 12 ounces New York Strip steak; kosher salt; black pepper; 1 tablespoon olive oil; 2 yellow onions; ½ teaspoon fresh thyme leaves; 2 ciabatta buns; ½ cup baby arugula; ⅓ cup mayonnaise; 2 tablespoons Dijon mustard; 1 tablespoon whole-grain mustard; 2 tablespoons sour cream; ⅛ teaspoon kosher salt

User Reviews

5.0

3 reviews

Excellent

Prep Time
5 mins
Cook Time
5 mins
Total Time
30 mins
Servings
2 servings
Calories
846 kcal
Course
Main Course
Cuisine
American

Steak Sandwich with Grilled Onions

Iris Warren

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This Steak Sandwich with Grilled Onions is restaurant-level goodness piled high on ciabatta bread with a tangy mustard-mayo sauce.

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Ingredients

Servings

12 ounces New York Strip steak
kosher salt
black pepper
1 tablespoon olive oil
2 yellow onions sliced in rings
½ teaspoon fresh thyme leaves
2 ciabatta buns or baguette, Italian loaf, or other rustic bread
½ cup baby arugula

For the Mustard Mayo:

⅓ cup mayonnaise
2 tablespoons Dijon mustard
1 tablespoon whole-grain mustard
2 tablespoons sour cream
⅛ teaspoon kosher salt

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Instructions

Make the Mustard Mayo Sauce

Stir all ingredients for the sauce together in a small bowl and set it aside until needed.

Prep and Cook the Steak

Season the steak liberally with salt and pepper on both sides.
Heat the olive oil in a medium skillet over high heat until it's almost smoking.
Add the seasoned steak to the hot pan and sear on each side for about a minute.
Reduce the heat to low and cook the steak for about 7 to 10 minutes for rare, and 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.

Make the Caramelized Onions

Using the same pan without cleaning it, heat 1 1/2 tablespoons of olive oil over medium heat.
Add the onion and thyme and saute, stirring often, for about 10 minutes or until the onions are brown and caramelized.

Assemble the Sandwiches

Slice the steak on an angle across the grain.
Spread the mustard-mayo sauce on top and bottom of the bread.
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.

Notes

You'll have the best results if you start with a steak that's at room temperature.
The pan should be very hot for the searing step. I use a cast iron skillet because it gets really hot and holds the heat for a long time.
When cooking the onions, stir them often making sure you turn them over frequently so they all cook evenly and turn a golden, caramel brown.

Nutrition Information

Show Details

Serving 1 Calories 846kcal (42%) Carbohydrates 39g (13%) Protein 43g (86%) Fat 57g (88%) Saturated Fat 16g (80%) Polyunsaturated Fat 18g Monounsaturated Fat 18g Trans Fat 0.1g Cholesterol 159mg (53%) Sodium 1002mg (42%) Potassium 771mg (22%) Fiber 4g (16%) Sugar 6g (12%) Vitamin A 260IU (5%) Vitamin C 10mg (11%) Calcium 104mg (10%) Iron 3mg (17%)

Nutrition Facts

Serving: 2servings

Amount Per Serving

Calories 846 kcal

% Daily Value*

Serving	1
Calories	846kcal	42%
Carbohydrates	39g	13%
Protein	43g	86%
Fat	57g	88%
Saturated Fat	16g	80%
Polyunsaturated Fat	18g	106%
Monounsaturated Fat	18g	90%
Trans Fat	0.1g	5%
Cholesterol	159mg	53%
Sodium	1002mg	42%
Potassium	771mg	16%
Fiber	4g	16%
Sugar	6g	12%
Vitamin A	260IU	5%
Vitamin C	10mg	11%
Calcium	104mg	10%
Iron	3mg	17%