The Recipes Project consists of an international group of scholars interested in the history of recipes. Read Jodi's post, "Al the Britons doe dye themselues wyth woade: experimenting with woad and its history," here.
Image Credit: Waid, Crucifera isatis. Johann Georg Sturm (Painter: Jacob Sturm). Deutschlands Flora in Abbildungen (1796). Available from http://www.biolib.de.