Chef John's Ultimate Steak Sandwich

In this non-traditional steak sandwich, the steak is cut into thick strips, so we're able to get a nice sear on the outside without having to worry about the inside overcooking.

• Preparation Time: 10 mins
• Cooking Time: 20 mins
• Total Time: 30 mins
• Calories: 635 Calories

Ingredients

• 2 tablespoons vegetable oil
• 1 tablespoon cider vinegar
• 2 tablespoons extra virgin olive oil
• salt and pepper to taste
• 1 cup quartered cherry tomatoes
• salt and pepper
• 1 tablespoon sherry vinegar
• 1 (2 pound) fully-trimmed flat iron steak
• 8 ounces brown clamshell mushrooms, grilled, separated
• 3 tablespoons barbeque sauce
• 6 hot dog buns
• ½ cup mayonnaise, or as needed
• 1 cup arugula leaves, or as needed

Recipe Instructions

Step 1

Preheat an outdoor grill for medium-high heat, and lightly oil the grate.

Step 2

Cut steak into 6 thick strips. Season generously with salt and pepper.

Step 3

Grill mushrooms for 5-6 minutes over medium-high heat until they begin to wilt. Remove the stem end to separate the mushrooms.

Step 4

Stir mushrooms in a bowl with salt and pepper, sherry vinegar, and extra virgin olive oil. Set aside.

Step 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.

Step 6

Whisk together barbeque sauce, cider vinegar and vegetable oil. Set aside.

Step 7

Serve grilled steaks on hot dog buns with mayonnaise, arugula, cherry tomatoes, grilled mushrooms, and barbeque sauce mixture.