I recorded a great Quincy Jones ballad on euphonium for the Flushing Town Hall Virtual Jazz Jam. I first heard this song on an album of Ake Persson, a really beautiful Swedish trombonist, and fell in love with the tune. The whole evening is online here:
https://www.facebook.com/flushingtownhall/videos/722165095000133/
There are some great performances, so check it out!
But here is my recording: