I've included this in my custom ROMs for the GT1 Mini, but if you just want to install TWRP recovery independently... Fastboot image: twrp.u211-3.2.3-1.img Signed update: twrp.u211-3.2.3-1-signed.zip (can install from UPDATE app)
The .zip you just install using the Update & Backup app like an OTA update. The .img can be installed via dd in root (or in fastboot, but you can't really reboot to bootloader on Amlogic devices).