My grandfather always had "Bruno's" Rye bread, a staple at his house, believe it was made in Chicago. This stuff was so solid my mom called it "cement bread" but he (and I) I loved it with some butter and thin sliced Lachsschinken. I used to buy a loaf and keep it in my desk at work for lunch or whenever I needed a snack. Everyone called it pumpernickel, even though it was a rye. They either stopped distributing it to our area or went outta biz circa 2016 and this note reminded me of how much I miss that satiating dense, forever lasting unperishable loaf of goodness! Do you have a recipe you're willing can share? I knew the feeling you describe and want to experience it again