Boufa, I made it and it came out wonderful!!
Actually I used a little different covering, as I was in the mood for richer creamier icing, I mixed
150g robiola (or I am sure mascarpone would be wonderful, too, or some other spreadable cream cheese could be used)
finely ground zest of one lemon
enough powdered sugar to make about 1 cup + of icing
came out a wonderfully creamy and lemony icing...
We enjoyed it very much also our dinner guest!!
Thanks for the wonderful idea, it will be added to our regular repartoire, and next time I will try the original glaze, too!!