Mix all the marinade ingredients in a small pan. Pull out the mushroom stalks, but don’t peel the caps. Cut the aubergines in long thick slices and score one side of the flesh in a criss-cross fashion. Brush the vegetables with some of the marinade and griddle or barbecue for about 5-10 mins, turning until they soften. Brush once more with the marinade during cooking and again before serving.