menuentry "Linux Mint LiveCD" {
    loopback loop /boot/iso/linuxmint-22.3-mate-64bit.iso
    linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/boot/iso/
                        linuxmint-22.3-mate-64bit.iso noeject noprompt --
    initrd (loop)/casper/initrd.lz
   }