Croissant Steak Sandwiches With Caramelized Onions And Horseradi

Total Time: 50 mins Preparation Time: 10 mins Cook Time: 40 mins

Ingredients

• Servings: 4
• 1/2 cup mayonnaise
• 1/4 cup 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

Recipe

• 1 mix mayonnaise and horseradish in small bowl to blend.
• 2 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.
• 3 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.
• 4 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.