Rye bread

Rye bread is a type of bread made with various proportions of flour from rye grain. It can be light or dark in color, depending on the type of flour used and the addition of coloring agents, and is typically denser than bread made from wheat flour. It is higher in fiber than white bread and is often darker in color and stronger in flavor.

Quotes

 * I hate to say it, but, after the novelty wore off, I had this cliché moment of a Russian émigré abroad: I really missed black bread. I know it’s stupid, but I really missed it.
 * Alexey Navalny, as quoted in "Net Impact: One man's cyber-crusade against Russian corruption" (4 April 2011), by Julia Ioffe, The New Yorker