Colourful salads start many summer meals in Spain, and are a communal affair. The bowl is put in the centre of the table and everyone helps themselves, with a fork.
To peel the tomatoes, place them in a heatproof bowl, pour over boiling water to cover and leave to stand for 1 minute. Lift out with a slotted spoon and plunge into a bowl of cold water. Leave for 1 minute, then drain. Slip off the skins and dice the flesh finely. Put in a salad bowl.