2Add a clove of garlic and a sprig of thyme to the pan.
3Add a dash of olive oil to the pan and sear the steak with salt and pepper.
4Slice the onion into rings and add to the pan.
5Add a splash of steak sauce to the pan and continue cooking the steak and onions.
6Prepare a spicy mayonnaise by mixing mayonnaise and hot sauce in a bowl.
7Assemble the sandwich by spreading the spicy mayonnaise on the toasted bread, then layer with arugula, cooked onion rings, sliced steak, and additional onion rings.