I know there must be better ways to do this, but they all seem to involve large bandsaws, which I don’t have.
First you cut around the edges with the table saw (which really needs a tall fence to do it right) then use the resulting kerf as a guide for the handsaw. Simple, right? I figure if I take a few strokes every time I walk by, I’ll be done in a month or so.
In the future, I’ll try to remember to do this before gluing the halves together.