Halve the nectarines or peaches and cut into slices. Place in a baking dish, sprinkle with brown sugar and pour sherry over it. Beat egg whites with icing sugar until very stiff and spoon over.
Preheat the oven to 180 ° top / bottom heat and bake the gratin for about 15-20 minutes.
Let the gratin cool and serve with vanilla ice cream and / or whipped cream, if desired.
Tip:
Marsala or lemon juice can also be used instead of sherry. The meringue could also be beaten with brown sugar until stiff.