Bill Machin wrote: (cli[p) but both would be fairly lossy in terms of
material waste
(clip)Any thoughts or ideas?
^^^^^^^^^^^^^^
I would mount the blank on the lathe, with the platter part toward the
tailstock. Turn it round, and make a pencil line to show where you plan to
part off the flat platter blank.

Now, start turning the outside of the bowl, leaving the platter part
untouched. When you get fairly close to the foot, use a handsaw to drop off
the platter, and then complete the bowl. You will waste only the kerf of a
handsaw.