Mix meat, crumbs, milk, onion, and spices. Pat into a square cake pan and let it sit overnight.When you are ready, cut into squares. Preheat oven to 350°F (175°C).
Coat with flour and brown in butter.Transfer to a baking dish and cover with a mixture of soup, water, and mushrooms.
Bake for 90 minutes.Enjoy this comforting and soul-warming Amish Wedding Steak with your loved ones and relish the timeless taste of the Amish heritage.