Muu is radish. I don't like radish much specially the smell of it. We bought this fermented radish together with deodeog when we went to Sunchang. I can imagine eating sweet and salty tamarind when i eat it. Hajuma said that this muu was fermented for three years. I think so.
I couldn't take the picture of the muu that we bought because as soon as we came home my mother in law cut it and put some sesame oil and sesame seeds before she left. And yes, this is radish. I'm also wondering what they put in it and how it became that color.