Create Grub menu-entries for LiveOS‘ on an LVM Volume

In preparation there is a LiveUSB-stick with multiple functions - one of them is to have multiple live operating systems which are stored on a LVM partition: Part1: Grub PV: OS L VG: vOS L LV: Tails L LV: Debian Installer The .iso s are „dd if= of= „ on the logical volumes. Task is: - write the menuentries so Grub either — boots the operating systems directly from the LV — loads the configfile of the LiveOS‘ Grub and boots the system — any other solution that boots the systems from the LVs