500g pieces trimmed skirt of beef
4 garlic cloves, smashed and peeled
small bunch thyme
6 tbsp olive oil
1 oblong loaf sourdough bread
1 beefsteak tomato, sliced
6 long leaves Cos lettuce

= Sauce =
50g cocktail gherkins, finely chopped
1 heaped tbsp capers, finely chopped
1 bunch flat-leaf parsley, leaves finely chopped
7 tbsp good-quality mayonnaise
splash Worcestershire sauce
4 shakes Tabasco sauce
1 small red onion, finely chopped