I started with one old brass serving tray and a few discs of various metals - copper, brass and aluminum.
The above photo shows the small bowls after annealing and with the first folds in place.
The serving tray becomes a rough bowl about 250mm across - still some beating to be done. I left the decorative edge on - used the whole tray.
And the small bowls in the rough - final beating and cleaning yet to be done. Will post again when the bowls are cleaned etc.