Chef John's Ultimate Steak Sandwich

Chef John's Ultimate Steak Sandwich
  • 1 (2 pound) fully-trimmed flat iron steak
  • salt and pepper
  • 8 ounces brown clamshell mushrooms, grilled, separated
  • salt and pepper to taste
  • 1 tablespoon sherry vinegar
  • 2 tablespoons extra virgin olive oil
  • 3 tablespoons barbeque sauce
  • 2 tablespoons vegetable oil
  • 1 tablespoon cider vinegar
  • 6 hot dog buns
  • 1/2 cup mayonnaise, or as needed
  • 1 cup arugula leaves, or as needed
  • 1 cup quartered cherry tomatoes


  1. Preheat an outdoor grill for medium-high heat, and lightly oil the grate.
  2. Cut steak into 6 thick strips. Season generously with salt and pepper.
  3. Grill mushrooms for 5-6 minutes over medium-high heat until they begin to wilt. Remove the stem end to separate the mushrooms.
  4. Stir mushrooms in a bowl with salt and pepper, sherry vinegar, and extra virgin olive oil. Set aside.
  5. Grill steaks for 3-4 minutes per side over medium-high heat, until medium rare or to desired doneness. An instant-read thermometer inserted into the center should read 140 degrees F (60 degrees C). Let rest for 5 minutes.
  6. Whisk together barbeque sauce, cider vinegar and vegetable oil. Set aside.
  7. Serve grilled steaks on hot dog buns with mayonnaise, arugula, cherry tomatoes, grilled mushrooms, and barbeque sauce mixture.

04/17/2018
Chef John's Ultimate Steak Sandwich, recipe PT15M PT1H 5 455 calories

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