CROISSANT STEAK SANDWICHES WITH CARAMELIZED ONIONS AND HORSERADI

Croissant Steak Sandwiches With Caramelized Onions and Horseradi image

My family loves these sandwiches. We also make them with leftover flank steak, or any other leftover meat.

Provided by lazyme

Time 50m

Yield 4 serving(s)

Number Of Ingredients 9

Ingredients

1/2 cup mayonnaise
1/4 cup white horseradish, prepared
4 tablespoons butter (1/2 stick, divided)
3 beef tenderloin steaks, thick
3 medium onions, thinly sliced
8 ounces shiitake mushrooms, stemmed, caps thinly sliced (about 5 cups)
1 cup beef broth
4 large croissants, halved horizontally, lightly toasted
2 cups arugula

Steps:

Mix mayonnaise and horseradish in small bowl to blend.
Melt 1 tablespoon butter in heavy large skillet over medium-high heat. Sprinkle tenderloin steaks with salt and pepper. Add steaks to skillet and cook to desired doneness, about 5 minutes per side for medium-rare. Using tongs, transfer steaks to work surface.
Melt 3 tablespoons butter in same skillet over medium-high heat. Add onions; sauté until dark brown, about 25 minutes. Add mushrooms; sauté until tender, about 5 minutes. Add broth; boil until juices are reduced to glaze, stirring occasionally, about 1 minute. Season onion mixture to taste with salt and pepper.
Place 1 croissant bottom, cut side up, on each of 4 plates. Spread each with horseradish mayonnaise and top with 1/2 cup arugula. Thinly slice steaks and divide among croissants. Top with onion mixture. Spread remaining mayonnaise on cut side of croissant tops. Place tops on sandwiches.

Nutrition Facts : Calories 858.5, Fat 58.4, SaturatedFat 25.7, Cholesterol 187.6, Sodium 886.6, Carbohydrate 51.4, Fiber 5.2, Sugar 15.7, Protein 33.3