Russian Black Bread

This morning I went with my Dad to the Russian food stores near here. I got an assortment of Russian candies (which I didn't eat yet because they are so pretty) and some of this black bread. He said his parents only ate butter on it. I found that this was just right. Later, I did put some of my tomato jam on it, which I made the other day. That was good. I also added a few slices of Jarlsburg cheese on the side.