Since 1909. Extra flavor, extra taste! 8 Chicago deli style buns. Great sandwiches start with great bread! Chicago's deli favorite! Fruit. Grains. Vegetables. Protein. Dairy. A Chicago tradition since 1909, S.Rosen's has a proud reputation for baking the best tasting deli rolls, buns and breads. S.Rosen's klassic onion buns bring classic deli flavor and zesty onion taste to your favorite sandwiches. A truly delicious way to make your sandwich special. - Sam Rosen.