Sizzler - Two Legendary Salad Bars for the Price of One (Tuesdays Only - All Restaurants)
Sizzler - Buy One Salad Bar, Get One Free (Tuesdays only)
Available at all restaurants (previously it was only Perth - http://www.ozbargain.com.au/node/101304)
Found this deal from their Facebook page however you don't need to go through their FB app - I have uploaded the generic coupon.
Deal expires 23th July 2013.
Salad Bar price starts from $16.50/pp (lunch) and ~$25.00/pp (dinner)
IMO - the quality of food varies from store to store, but its much 'cleaner' these days after they had the 'rat poison' saga few years back.
Sizzler Menu: http://www.sizzler.com.au/menu