It is known as "Gritwurst" in my home county (Goodhue Co., MN) and you can still get it served at Bev's Cafe in Red Wing, MN, for example. In the Cincinnati, OH area you can buy "Goetta" in the supermarket which is presumably similar stuff.
Sorry, I don't have a recipe but the major ingredients, Goodhue Co.-style, are pork head trimmings and steel cut oats.
Brad