Roasting tomatoes helps to concentrate their flavour, while the addition of balsamic vinegar enhances their sweetness. This salad is great for summer when there is an abundance of tomatoes, but it can be made at any time of year. Just select the best fresh tomatoes available. Serve warm with a green salad and crusty bread, to mop up the juices. It can also be served as an accompaniment to any meal. Variations: Serve with sliced mozzarella cheese or a barbecued steak. Purée this salad in a blender to make a sauce to toss into pasta. Cover and store in the fridge for 3-4 days or freeze for up to 1 month.