Döppekuche - Sausage and Potato Casserole

We made this from a recipe found in Grandma's German Cookbook by Birgit Hamm and Linn Schmidt. It's basically shredded onion and potato with yogurt and sausages baked for 4 hours. It tastes like Germany so of course it's amazing. I find this meal really showcases the sort of tang that a lot of German food has.