https://vitobotta.com/2018/01/11/ubuntu-full-disk-encryption-manual-partitioning-uefi/
Modified to use a seperate encrypted partition for /home
Run gparted, and do the following:
delete all the existing partitions on the target disk
create a new partition table of type parimary
create a fat32 partition of 256MB with name “EFI System Partition” and label “ESP”, then click “Apply” to actually create the partition
right-click on the partition you’ve just created, click “Manage flags” and check “esp”, then click “Apply again”