Image of Chef John's Ultimate Steak Sandwich

Chef John's Ultimate Steak Sandwich

Prep Time: 10 min
Cook Time: 20 min

Ingredients

  • 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
  • ½ cup mayonnaise, or as needed
  • 1 cup arugula leaves, or as needed
  • 1 cup quartered cherry tomatoes