1970 Gungmin Hakgyo Geupsik Oksusu Ppang is a bakery in Busan that sells one kind of corn bread based on old school lunch bread. The corn flour content is over 90 percent, so the bread is dense and dry, but it grows nutty the longer you chew it. As the name suggests, the bread is sold in bundles of three pieces per row, the way it was served in school lunches. The texture is not soft.