The network wasted no time between the final episode of series four on Wednesday night, and the launch of the new three-week series.
The short-run format, which ran from 7pm to 8pm last night, sees the return of four contestants from each of the previous seasons compete in teams.
The cooking show took 1.256m viewers across the five city metro market, according to preliminary ratings from OzTam.
MasterChef All Stars easily won its time slot, beating Nine’s Olympics warm-up show Let the Game Begin, which rated with just 486,000. It also beat Home & Away and Border Security on Seven, which rated with 943,000 and 461,000, respectively.
MasterChef also won the night in two of the three key advertising demographics, 16-39 and 18-25.
Besides MasterChef, however, no other Ten shows made it into the top ten, which was