Magnus Nilsson wrote what may be the definitive book on Nordic cooking, and he tells guest host Melissa Clark that there's more to it than pickled herring. Melissa also talks with John Wurdeman about preserving an 8,000-year-old Georgian wine tradition. Tucker Shaw, from America's Test Kitchen, gives the recipe for making perfect steak frites at home. And managing producer Sally Swift gets the lowdown on tahini from Adeena Sussman.

Broadcast dates for this episode:

• July 22, 2016 (originally aired)
• July 28, 2017 (rebroadcast)