Trim off excess fat, season both sides with sea salt and black pepper, and tenderise with a meat hammer. If not already at room temperature, leave to rest at room temperature for at least 10 minutes (but no longer, as the salt will begin to pull moisture from the beef). Meanwhile, roughly chop 2 garlic cloves
Add the olive oil, bay leaf and garlic to pan over medium-high heat.
Add the steak and sear for 2 minutes, without moving it. This helps the crust to develop. If your garlic looks at risk of burning, remove it or place it on top of the steak. If cooking two steaks at once, make sure they each have sufficient cooking space to not overcrowd the pan and begin to steam.
Flip the steak over, and sear on the other side for another 2 minutes.
Remove steak from the pan and leave to rest on a surface - don’t touch it!
Maintaining the same heat, add around 100ml white wine to the pan, scrape up any brown bits (fond), and add the mustard and Worcestershire sauce. Reduce by just over half or until you reach a thick consistency.
Meanwhile, in a separate pan, heat a touch of vegetable oil over medium-low heat, crack egg and drop into pan to cook sunny side up, basting with the oil and seasoning lightly with sea salt and black pepper, until whites become solid.
Quickly add the steak back to the pan, add the butter and, using a spoon, gently incorporate the butter into the pan sauce.
Plate steak with the sauce all around it, place egg on the steak, and serve with fries and rice!