Remove the stones from the olives with a pitter or a sharp knife. Put in a food processor with the capers, anchovies, garlic and thyme, and whizz to a rough puree. Squeeze in the lemon juice and, with the motor still running, add the oil.
Alternatively, pound the garlic, anchovies, capers and thyme together in a pestle and mortar until smooth, followed by the olives, leaving these slightly more chunky. Then gradually add the oil and lemon juice, pounding between pours.
200g whole black olives, preferably niçoise or kalamata
3 tablespoons capers, well rinsed if packed in salt
2 anchovies, well rinsed if packed in salt, roughly chopped
1 fat clove of garlic, crushed
2 teaspoons fresh thyme, chopped
1 tablespoon chopped, fresh parsley
Juice of ½ lemon
5 tablespoons extra-virgin olive oil