Bootable USB-UEFI drive with Linux?

Question

linux

I have a 2.5" SSD with Linux (MBR), USB 3.0 box.
I need to be able to boot it via UEFI from external media.
How to do this?
Rewrite the partition table to GPT, add a 200mb boot partition with fat32, install the bootloader there
The problem is that I did it several times, but did not achieve the result: not bootable.I would
like a link to a proven solution.

Answer 1

The fact is that the bootloader is not enough. UEFI entry required. Most UEFIs automatically detect media and add a temporary entry.
First you need to test a known working media.