I found a new produce—new to me at least—at Trader Joe’s this week, Thomcord grapes. These grapes are a crossbreed of Thomson seedless and Concord grapes. They have dark purple skins and a wonderful flavor. While my wife Jan does not like grape jelly—growing up her mother bought nothing but Welch’s grape jelly—daughter Eilene loves it. She asked me to turn these grapes into a jam.