Heat half of the oil in a pan. Add the garlic (cut-side down) and mixed herbs.
Halve any large tomatoes.
Add the tomatoes to the pan and cook over a low heat for about 30 minutes. Add salt and pepper, to taste.
Once the tomato is soft, remove the garlic. Decant the mixture into a sterilised bottle and pour over the remaining oil to cover. It is important that the tomatoes are completely covered with oil, so add more oil if it is not enough to cover.
Store the tomatoes in the fridge and eat within a week.