This isn't your ordinary steak sandwich recipe, this is Jamie Oliver's next level steak sandwich with onions and English mustard served in ciabatta.
Next-Level Steak&Onion Sandwich. Made this and a few other sandwiches For a big party - quick to make, onions are sooo good.
"This is my next-level steak and onion sandwich from my new book! Ive kinda taken the mighty steak off its pedestal a bit and putting most of the focus on awesome onions, to create the best steak sandwich EVER.
Next Level Steak & Onion Sandwich. Used arugula. I would reduce amt of vinegar which I believe was after conversion. The brown sugar was less than Meat was perfect and would make this again.