Singer/songwriter John Mayer dedicated himself to learning how to cook healthy meals while waiting for his damaged vocals to return to full strength last year (12).

The Daughters hitmaker underwent throat surgery in August and was ordered to preserve his voice for six months after a second operation to remove a granuloma from his vocal cords.

And now he tells Rolling Stone magazine he has been using his down time to cook up a storm and overhaul his lifestyle.

He explains, "There were days and weeks and literally months of not doing anything, and running out of things to do when there's nothing to do... I was watching a whole bunch of Westerns every night and making rice bowls with chicken... just healthy food. I'm on a bran diet, man. I'm the king of rice and chicken."

He adds, "At 35, you realise you just can't do whatever you want to do in terms of diet, sleep and overuse. You're held accountable. It's a ratio of one to one of what you put in to what you get out. I never went off the rails, but, as a singer, you have to really watch what you put into your body. Especially with what you put in your body before you lay flat and go to sleep.

"You don't realise that when you go out and have a couple drinks and you come back home and you pass out, you're raiding your esophagus with acid from two or three whiskey sours. If you do that night after night and then you sing eight hours a day while you're writing a record, you're going to start wearing away at the stuff in your throat."