k3b can't find cdrecord

[Gary Dale <garydale@torfree.net>]

I'm running Debian/Stretch AMD64 using plasma desktop and I'm trying to 
burn a CD image. However when I start k3b, I get an error message 
"unable to find cdrecord executable" along with the suggestion that I 
install cdrtools. K3b refuses to burn the CD image.

There is no package cdrtools but there was libcdr-tools. Unfortunately 
installing that didn't help. Google was no help and neither was a search 
of packages.debian.org.

I realize optical media is passé these days, but I find it difficult to 
believe that support for burning CDs has been dropped. What do I have to 
do to get k3b to burn a CD?