All across the nation, local food boards hosted cooking, gardening, and food preservation classes, handing out recipes that replaced wartime commodities with other ingredients. An official cookbook was published by the State Department of Defense called Win the War in the Kitchen and demonstrations from the book were given at the Patriotic Food Show in Chicago in January of 1918. The publication helpfully gave insight on why certain products needed to be conserved and provided instructions for preparing dishes such as Creamed Rabbit and Peanut Loaf.
The National World War I Museum and Memorial is now hosting an extensive online exhibit titled War Fare, which explains the many ways that food supply was affected by and influenced the war. You can see the full text of Win the War in the Kitchen, as well as view videos of recipe demonstrations and discussions.