The pair dated for nearly six months before he dumped Glenn by e-mail in Jun 2009.
"The reason I broke up with Pia Glenn is that I came to feel that she's an unstable person who carries around a large, radioactive bucket of stress wherever she goes. It was just exhausting to deal with," the New York Post quoted him as saying.
"Her recent explosions . . . demonstrate that she is also an accomplished liar.
"It is hard even to list the untruths in her article. We never lived together-she lived at her father's home in Freeport, LI. We never agreed to have children together. Our relationship lasted five and a half months, so it's hard to see how I 'stole a year' of her life.
"What most distresses me, however, is her statement that I am still 'obsessed' with my ex-wife, Padma Lakshmi.
"When my marriage to Padma ended I was saddened and hurt, that's true, but that was two and a half years ago, and, like any adult, I have accepted the world as it is.
"As any of my friends can attest, I long ago turned the page and moved on," he added.