'Biggest Loser' Star -- Slams 1,000 Cal Breakfast -- Before Fat-Sucking Sesh

Ajay Rochester -- who hosted Australia's version of "The Biggest Loser" -- just had 1.5 Liters of fat sucked out of her body ... but first, she bellied up to a 1,000 calorie breakfast of bacon, eggs and hash browns.

Ajay hit up Dr. Aaron Rollins Friday at Elite Body Sculpture in Bev Hills, and got something called an Airsculpt Laser Lipo -- a fancy name for precision fat sucking. We're told Ajay was 100% awake for the procedure -- no needles, no cutting, no stitches -- while the doc targeted her chin and arms.

Ajay says her ultimate goal is rocking sleeveless dresses and tops -- not that she was thinking about that when breakfast was served.