About Janis Thiessen Janis Thiessen is an associate professor of History and Associate Director of the Oral History Centre at the University of Winnipeg. Her favourite snack food is dill pickle potato chips. Books by Janis Thiessen mmm... Manitoba The Stories Behind the Foods We Eat by (author) Kimberley Moore & Janis Thiessen Necessary Idealism a history of Westgate Mennonite Collegiate by (author) Janis Thiessen Snacks A Canadian Food History by (author) Janis Thiessen