Carmen Devito and Alice Marcus Krieg are talking about the Columbian Exchange on this week's episode of We Dig Plants. But don't misconstrue this discussion as a celebration! On the phone is culinary horticulturist and historian Scott D.

This week on Cooking Issues Dave and Nastassia get out their Valentine's Day gripes early in the morning. But moreover, Celiac disease sufferers, rejoice! Tune in for an episode all about how you can cook without gluten using xanthan and guar gums and even eggs!