Reply by Loren

Since your curve isn’t dramatic I would suggest you
consider using applied moldings.

Just make the frame and cut a rabbet in the front
and drop your panel into it. You could even clamp
and glue your panel to the frame this way. The
joinery is super-easy too. Nobody seems to know
about them but I have used ROUND biscuits many
times with success. It’s a simple alternative to loose-tenon
joinery.

I’m suggesting applied moldings because I don’t
think they would be hard to bend for such a mild
curve. Just steaming the moldings and clamping them
in a bandsawn form should do the trick. Perhaps
I would bend the molding stock and then cut the
profile on the edge.