> You need a heat diffuser. I do not know if the kitchen stores in Italy would have one, but they are available on Amazon here in the US. Take a look there and see what I am talking about.
>

There's different grades of diffusion from this:

http://ep.yimg.com/ay/kitchendance/heat-diffuser-4.jpg

through this:

http://www.simmermat.com/images/wher...-simmermat.jpg

to this:

http://fantes.com/images/8635trivets.jpg

The last one is a bit extreme - is it even safe?

middle one looks interesting.