1. First of all download all the things you need. fastboot driverhttp://www.mediafire.com/download/r4jj46i5683yapf/minimal_adb_fastboot_v1.3.1_setup.exe and install this to your PC! twrphttp://www.mediafire.com/download/e7h0kuhqwaz4mra/TWRP_2.8.7.0_MINOTELTE.img and Copy it to Minimal ADB and Fastboot folder supersu [ https://download.chainfire.eu/897/SuperSU/BETA-SuperSU-v2.67-20160121175247.zip?retrieve_file=1 ]
2. Power off your device and turn it back on by holding Power button and Volume Down at the same time. This will get you into fastboot menu.
3. Woohoo great now what you will have to do is plug your phone to your PC using a usb cable. Wait until drivers installed correctly.
4. Go to Minimal ADB and Fastboot folder on your PC and RUN BAT file with admin rights.
5. Now type in the black box fastboot devices just to make sure that your device is listed correctly.
6. Rename TWRP_2.8.7.0_MINOTELTE.img to twrp.img (makes lifes easier)
7. Type fastboot boot twrp.img
8. Now your phone should boot into TWRP!! Go to install and flash the SuperSU zip.
9. Reboot and you are all rooted with Stock Recovery and Stable ROM! And your stock MiRecovery remains...