With odds at 1.10 and 1.15 on TAB and Sportsbet respectively, the Perth-based church relationship manager led the pack.
Justin proved he was a force to be reckoned with from the beginning when he whipped up his mum's chicken curry.
"MasterChef means for me the chance to chase a dream...it has the ability to drastically change your life," he told Ten.
Justin was the bookies' favourite to win.
Ahead of the premiere, judge Jock Zonfrillo spoke to WHO about the incredible talents of this year's contestants.
"They serve up some of the best dishes that we’ve ever seen on any season of MasterChef," he revealed.
"The show’s tagline 'ordinary people, extraordinary food' couldn’t be more true this year. We look at one another sometimes and can’t believe what we’re seeing and getting to eat. It’s a privilege to share this crazy experience with these guys."