Traditional recipe in Tenerife
Preparation: Put a fistful of salt and a handful of fresh, finely-chopped coriander, some garlic cloves and a tip of a teaspoon of cumin in the mortar. Crush all the ingredients well and add a few green chilli peppers cut into strips. Continue crushing until you get a paste that mixes well with a splash of oil and a little less vinegar. Some people add a little dry white wine, though this is optional.