Imagine how delighted seven seasons’ worth of contestants would be if Simon Cowell stepped onto the Idol stage to sing – and, subsequently, be judged. On Season 2 of Food Network’s The Next Iron Chef , a hard-to-please judge will most certainly be on the set…but not to offer her critique. Starting Sunday, Chopped ‘s Amanda Freitag will be stepping out from behind the big table to stand under the harsh glare of criticism herself. Freitag is bucking to be The Next Iron Chef , the second the