Octomom -- Post-Rehab Thanksgiving Feast With Children of the Cornbread

It's official ... Octomom has completed 30 days of rehab -- and she celebrated the achievement yesterday by reuniting with her 14 children at the Thanksgiving dinner table ... and TMZ has the pics.

A rep for Octomom -- real name Nadya Suleman -- tells TMZ, she completed her 30-day program at Chapman Rehab yesterday and immediately went home to help prepare a Thanksgiving meal for her kids.

We're told the meal consisted of a whole ham, apple sauce, stuffing, and your usual Turkey Day fixins ... minus the turkey. (Seriously, they didn't eat any turkey.)

As we reported, Nadya entered treatment for a Xanax dependency and anxiety issues -- and her rep tells us, she's so committed to conquering her demons ... she has voluntarily agreed to attend additional treatment sessions while she lives at home.

Octo's nannies have been keeping the children on strict schedules for sleeping, eating, bathing, and homework while mommy was away -- and Octo plans to follow the same program now that she's back.

The rep says Octo's extremely proud of her rehab achievements, but knows there's still lots of work to be done.