Italian tubular cast on

A skein of Malabrigo Sock yarn is tempting me to knit a hat. For a hat one needs a pretty and stretchy cast on method. Here's some favorites:
A tutorial for a great cast on for 1*1 rib without a scrap yarn. Let's do it Italian style baby!
And with a little helps from Ysolda you can turn that to 2*2 rib as well.