Step 1: Place a griddle pan over a high heat. Once hot, grill 1 side of each slice of sourdough for approximately 2 minutes and remove from the pan.

Step 2: Drizzle each grilled side with 1 tablespoon of Extra Virgin Olive Oil and set aside.

Step 3: Place the steaks onto a tray and drizzle over the remaining Extra Virgin Olive Oil and season with salt and pepper.

Step 4: Place the steaks onto the hot griddle pan and cook for 2 minutes on each side, then place back on the tray to rest and keep warm.

Step 5: Meanwhile, remove the cos leaves, wash and dry well.

Step 6: To make the sandwiches, place 4 slices of sourdough, grilled slide down, onto your working bench. Top with the cos leaves, tomato, cucumber, steak, watercress and barbecue sauce, then close with the second piece of bread, grilled side up, and serve.