Name: Chef John's Ultimate Steak Sandwich
Prep time: 10 min
Cook time: 10 min
Yield: 6
Ingredients: Fully-trimmed flat iron steak - 1 (2 pound); Salt and pepper - 1 (2 pound); Brown clamshell mushrooms, grilled, separated - 8 ounces; Salt and pepper to taste - 8 ounces; Sherry vinegar - 1 tablespoon; Extra virgin olive oil - 2 tablespoons; Barbeque sauce - 3 tablespoons; Vegetable oil - 2 tablespoons; Cider vinegar - 1 tablespoon; Hot Dog Buns - 6; Mayonnaise, or as needed - ½ cup; Arugula leaves, or as needed - 1 cup; Quartered cherry tomatoes - 1 cup

Ingredients for - Chef John's Ultimate Steak Sandwich

1. Fully-trimmed flat iron steak 1 (2 pound)

2. Salt and pepper 1 (2 pound)

3. Brown clamshell mushrooms, grilled, separated 8 ounces

4. Salt and pepper to taste 8 ounces

5. Sherry vinegar 1 tablespoon

6. Extra virgin olive oil 2 tablespoons

7. Barbeque sauce 3 tablespoons

8. Vegetable oil 2 tablespoons

9. Cider vinegar 1 tablespoon

10. Hot Dog Buns 6

11. Mayonnaise, or as needed ½ cup

12. Arugula leaves, or as needed 1 cup

13. Quartered cherry tomatoes 1 cup

How to cook deliciously - Chef John's Ultimate Steak Sandwich

1 . Stage

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

2 . Stage

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

3 . Stage

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

4 . Stage

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

5 . Stage

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 . Stage

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

7 . Stage

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