How to install linux mint with UEFI Secure Boot with seperate root and home disk.
Note: boot partition will not be encrypted
Source:
https://askubuntu.com/questions/853497/grub-install-error-cannot-find-efi-directory
https://askubuntu.com/questions/126541/how-to-manually-install-boot-loader
https://nowhere.dk/articles/installing-linux-mint-ubuntu-desktop-edition-with-full-disk-encryption-and-lvm/comment-page-1