How do cooks prepare risotto in a restaurant?
It's actually hard to hold when it's almost all the way cooked - it'll start getting gluey if you let it cool off, but could start scorching on the bottom if it's not stirred, and get too runny if you keep adding stock.

Mario Batali said that risotto isn't finicky in the middle - so you can cook it part way, cool it down (I think he said he spread it on sheet pans to cool quickly), then you can add hot stock and cook it from that point, so you've already got a 10 minute head start.

I've also been to a restaurant where it was only served on the hour and half-hour.