• Thinly slice the tomatoes and onions, and arrange in a serving dish.
• To make the dressing, put all the ingredients in a screw-topped jar and shake well. Pour the dressing over the tomato and onion. Garnish with a sprig of coriander or parsley.

Cook's Tip

• Alternative idea: add grated orange rind to the dressing and use finely chopped fresh rosemary instead of the basil. Good with grilled lamb or pork sausages.