My mother cooked German soups and Eintopfe (One-pot meals) all winter. Soups transform simple ingredients into flavorful and filling meals. German Potato Soup with Smoked Sausage is the perfect example of this. The humble potato, the Erd-Apfel, was a side dish at almost every meal. (Boiled, fried, mashed, Klöße…) We were the only ones in our neighborhood with a special…