I am going to post this just in case. It has helped a couple people on here and it was the most annoying little problem. Here is a cut and paste from an old post of mine. The quote is what it says on my service invoice...
"Customer states clang from L/rear while driving, possible E-brake adjustment. Springs on rear P brake shoes misaligned. Remove rear rotors and reposition rear parking brake shoes"
I used to describe it as a crushed soup can being smashed against a strut tower when hitting a bump. But your dish-clanging description works too. I hope this solves your problem, I dealt with it for awhile and was embarassed.
'87 Z28 with mods | '05 GTO - Red on Red A4