Go Back
+ servings
Grilled Onion Steak Sandwich with Creamy Horseradish Sauce
Print Recipe
5 from 1 vote

Grilled Steak and Onion Sandwich with Creamy Horseradish Sauce

Perfectly grilled steak and onions on a chewy ciabatta bun with homemade horseradish sauce.
Prep Time20 minutes
Cook Time15 minutes
Total Time35 minutes
Course: Main Course
Cuisine: American
Servings: 4 sandwiches
Calories: 466kcal

Ingredients

For the creamy horseradish sauce:

  • ½ cup plain yogurt
  • 2 tablespoons mayonnaise
  • 1 tablespoon horseradish
  • 2 cloves garlic minced
  • ¼ teaspoon salt
  • ¼ teaspoon pepper

For the steak sandwiches:

  • 2 12-16 ounce sirloin steaks
  • Your favorite steak seasoning
  • 3 tablespoons olive oil
  • 2 yellow onions thinly sliced
  • 4 ciabatta buns
  • Butter for the buns
  • Arugula for topping

Instructions

For the horseradish sauce:

  • Make the horseradish sauce by combining all sauce ingredients and stirring well to combine. Cover and let sit in refrigerator until ready to use.

For the steak sandwiches:

  • Preheat grill over medium-high heat.
  • Season steak with steak seasoning.
  • Lightly brush with 1 tablespoon of olive oil. Let sit at room temperature for 20 minutes.
  • Meanwhile, toss onions with additional 2 tablespoons olive oil and season them with salt and pepper.
  • Place onions in a grilling pan or wrap in foil.
  • Place on grill and cook until onions are softened and beginning to caramelize, about 25 minutes.
  • Once steak has sat at room temperature for 20 minutes, place on grill.
  • Cook for 4-5 minutes, until steak is golden and has grill marks and then flip. For medium-rare, cook until 140 degrees F or another 3-4 minutes, for medium cook until 150-155 degrees F or another 5-6 minutes, and for medium-well cook until 160-165 degrees F or another 6-7 minutes. This always depends on the thickness of your steak. To be sure, use a meat thermometer.
  • Let your steak rest for 3 minutes before slicing.
  • While steak is resting, butter the buns.
  • Place bun halves on grill, butter side down, and lightly grill for 1-2 minutes. Keep a close eye on them as they will burn easily.
  • Once steak has rested, cut it as thinly as possible.
  • Place approximately 2 tablespoons of spread on the bottom half of each bun.
  • Top with steak and onions.
  • Top with arugula and finally the top half of the bun.
  • Serve and enjoy!

Nutrition

Calories: 466kcal | Carbohydrates: 34g | Protein: 31g | Fat: 22g | Saturated Fat: 5g | Polyunsaturated Fat: 5g | Monounsaturated Fat: 11g | Trans Fat: 0.01g | Cholesterol: 76mg | Sodium: 561mg | Potassium: 533mg | Fiber: 2g | Sugar: 4g | Vitamin A: 37IU | Vitamin C: 6mg | Calcium: 87mg | Iron: 2mg