you'll need:
tomatoes, as many as you like!! halved or quarted depending on how big they are
sea salt
olive oil
halve or quarter your tomatoes, place them skin side down on a baking sheet. brush with a little olive oil and sprinkle with sea salt. roast in teh oven at 140C, 275F, gas mark 1 for 3-5 hours, until they look sun-dried and all the moisture has gone.
allow to cool and store in an airtight jar in the fridge.