MasterChef Australia All-Stars

All your favourite MasterChef contestants from seasons past, return to the MasterChef kitchen for the first ever MasterChef All Stars.

Tonight there is $20,000 up for grabs for our contestants' charities, so it's game on! Competing in four heats, our All Stars must first cook a Lebanese dish. Who will take home the $5,000 heat prize?

Everyone loves a sausage sizzle, so the All Stars head to Fire and Rescue NSW State Training College to treat 100 trainees. This isn't going to be an ordinary sausage sizzle.

It's the first Mystery Box, and what a Mystery Box it is. Some of our most impressive guest chefs from the past three seasons have included one ingredient each in the box.

A true All Star must have their knife skills down pat, so Gary puts our 12 contestants to the test with an onion chop challenge. Who will win their team an advantage?

With $10,000 up for grabs for their charity, the All Stars must conquer their "nightmare" dish to take home the prize.