2Sear the steak in a hot pan with olive oil, then add garlic and thyme.
3Add butter to the pan, baste the steak, and finish in the oven for 8 to 10 minutes.
4Make the relish by sauteing red onion and chili in olive oil, then add tomatoes, salt, pepper, and sherry vinegar. Stew until thickened, then stir in sliced basil.
5Combine mayonnaise and whole grain mustard for the sauce.
6Char-grill the sliced ciabatta bread in a pan with olive oil.
7Slice the steak, spread mayonnaise on the toasted bread, then layer with lettuce, beef, and tomato relish.