grub-efi install on multiple ESPs.

[Ram Ramesh <rramesh2400@gmail.com>]

    Hi,
    
      I have debian bookworm installed on a raid1 made from
    /dev/nvme0n1p3  and  /dev/nvme1n1p3.  Here are the partitions on the
    two nvme. 
    
    /dev/nvme0n1p1 = /dev/nvme1n1p1  = 7mb ef02
    /dev/nvme0n1p2 = /dev/nvme1n1p2  = 7mb ef00 (Two distinct ESPs on
    two different nvmes)
    /dev/nvme0n1p3 = /dev/nvme1n1p3  = 7mb 8300 (Linux RAID)
    
    I am currently using /dev/nvme1n1p2 as /boot/efi and
    groub-efi is installed there.
    
    I like to also install grub-efi on /dev/nvme0n1p1 to mimic
    RAID1. My Google search does not give me a clear way to do it. 
    There are a lot explanation on how certain things are to be done.
    Nothing succinctly describes the grub-install step. Since this is
    boot and grub, I like to be sure before I mess up some uefi files
    and make the system unbootable. 
    
    Can I mount the second esp on /mnt and do a simple grub-install
    --efi-directory=/mnt? Or should I undo current /boot/efi mount and
    mount second esp there and do a grub-install? 
    
    I was going to try a dry-run option, but I do not see one in "man
    grub-install."
    
    Regards
    Ramesh