My German beef fest

Back when I was a young bride, living in what was then West Germany, I was taught to cook two basic meals by Hanno's mum - Kartoffel Puffer or potato pancakes and Fleish Rouladen - stuffed beef rolls. Over the years I've probably made hundreds of Kartoffel Puffers, they're a regular in our house and everyone I serve them to loves them. We went off meat for a long time and ate only vegetarian