Recipe :
Peel and slice aubergines and steam for 15 minutes.
Leave to cool.
While cooling, chop onions and peel, seed and dice tomatoes.
Chop herbs and put to one side.
Mix the olive oil, yoghurt, chopped herbs, salt and pepper in a bowl, to make a sauce.
Add the aubergines, onions and tomatoes.
Stir carefully and serve on a bed of lettuce.