Get someone to turn you a nice wooden plate/bowl to your spec - real men do not use plastic!
Get a woodturner to make you one to your specifications.
Edit:
Ah, the great JF got there before me.
You know what, looking at the kapulika others posted made me think about wood - I have a lathe and should drag it out of the back of the man cave!!!! Wonder if I can convince the wife that eating from wood is safe!
We had a good sized sycamore come down at work recently that could yield some decent diameters.....