It's right there in the recipes on the iDiet website, recommended in the article by "Susan Roberts, a dietary scientist at Tufts University". I was surprised too-- I didn't think anyone still believed margarine was healthier than butter, but here it is:

https://www.theidiet.com/food/idiet-recipes/vanilla-spice-co...

And here's their cake made with egg whites, which I imagine is great for crying yourself to sleep while trying to ignore your hunger: https://www.theidiet.com/food/idiet-recipes/idiet-chocolate-...