MasterChef comes alive at Greenhouse in the Perth CBD Reality TV hit MasterChef was filming at Perth eatery The Greenhouse with executive chef Matt Stone. THE cast and crew of the upcoming season of MasterChef headed to Perth CBD restaurant Greenhouse this week. Perth'sNow's cameras caught contestants taking part in a challenge with executive chef Matt Stone, which will presumably involve his "conscious cooking" philosophy - using only local, fresh, sustainable, whole foods. Stone previously appeared on MasterChef in 2011 when contestants took part in a sustainability challenge. More than 80 cast and crew from the hit reality TV series headed west to film at several locations. Judges Matt Preston, Gary Mehigan and George Calombaris were spotted dining at some of Perth's trendiest eateries during their visit, including Gordon St Garage, Harvest and the Cottesloe Beach Hotel. Filming for MasterChef season five began in January and the series will air on Ten later this year.