proxmox VM to .ovf, how to create the .ovf?

I am trying to export a VM from my proxmox environment into a .ova filie format. It turns out a .ova is really a tar files with .vmdk (disk) .mf (list of checksums) and .ovf which appears to be a xml describing the hardware of the machine.

I have converted the proxmox raw file to a .vmdk
qemu-img convert -f raw -O vmdk /dev/pve/vm-101-disk-0 image.vmdk

What I can not find is any information on how I create the .ovf file which describes the hardware of the system.