Sydney's hatted chefs are pulling out all stops for October's Good Food Month.

Rockpool will take its menu back to 1989 for a Hats Off Dinner. AKI's Kumar Mahadevan is cooking Italian, Naples-style, and Danny Russo and James Viles from Biota Dining in Bowral are at Matt Moran's Chiswick for a night.

Registrations have been extended to Friday, see goodfoodmonth.com.