
Steak sandwich
Ingredients
For the steak
• 2 steak , 1- to 1-1/2 inches thick
• 2-3 tablespoons vegetable oil (depending on the size of your pan)
• 3 tablespoons unsalted butter , divided
• 3-4 large garlic cloves smashed and peeled
• 2-3 sprigs fresh herbs , such as rosemary or thyme
• kosher or sea salt and freshly-cracked black pepper
For sandwich
• 4 ciabatta rolls (about 6-inches in length) , split in half lengthwise
• 8 ounces sliced mushrooms
• 1 tablespoon unsalted butter
• 1/2 cup caramelised onions
• Rocket or other salad leaves
• kosher salt and freshly-ground black pepper
• 4 cheese slices
Mayo
• 1/2 cup mayonnaise
• 1 tablespoon full fat yogurt
• 1 large garlic clove , minced
• 1tsp horseradish or mustard
• kosher salt and freshly-ground black pepper
Instructions
Prepare ahead.
Onions
Make the caramelized onions by cooking sliced onion on a low heat with some butter till onions are soft and golden.
Mushrooms
Sauté mushrooms in pan over medium-high heat, with butter, a pinch of salt and pepper. Sauté until the liquid is released and evaporated and the mushrooms are beginning to brown around the edges. Remove from the pan and set aside.
Make the Mayo
In a bowl, whisk together mayonnaise, yogurt , garlic, horseradish or mustard and a pinch of salt and pepper. Cover and refrigerate for at least 30 minutes for the flavors to infuse.
Steak
1. Remove steak from the refrigerator 40-60 minutes before cooking. Pat the surface dry with a paper towel. Season both sides with salt and pepper. Let stand at room temperature until ready to cook.
2. Heat a large cast iron skillet over high heat until very hot.
3. Pat the steak dry again and add it to the pan with tongs. Let it cook for 2 minutes, then flip it to the other side to cook for 2 minutes longer.
4. Flip the steak again and add 2 tablespoons butter to the sides of the pan, letting it melt until foaming. Start to baste the top of the steak with the hot butter, gently tilting the pan if needed to collect it with your spoon. Continue cooking and basting for about a minute before flipping the steak again.
5. Add the remaining 1 tablespoon of butter, garlic cloves, and herbs to the pan. Continue basting the steak with the infused, browned butter a few times. Cook less for medium rare or a little longer for medium.
6. Transfer the steak to a plate and cover with foil. Rest for 10 minutes before slicing and serving, drizzling with any juices and a little browned butter from the pan. Sprinkle the sliced meat with a pinch of coarse sea salt, if desired.
Assemble the Sandwiches
1. Spread a little bit of the mayo on the bottom of each ciabatta roll. 1/4 of the sliced steak, sautéed mushrooms, and caramelized onions. Top with cheese, place under a grill till cheese begins to melt If desired then Layer each with a few rocket or salad leaves, spread a little extra mayo on the top half of the roll.
2. Sandwiches are best served immediately, while the steak is still warm.

