Back to stock recovery, help!

Hi, need help with my beloved Moto G (XT 1063). I rooted it, installed custom recovery and image and used it for months like that, two days ago went back to stock (restored from nandroid backup) and got a message about the new OTA update, download it but TWRP cannot install it, the phone just turns off again and again. Restored it once more, but this time did not give it a go to update. My question is, is it possible to flash just the original recovery (for Lollipop) and how in order to update the phone, or is it possible to stop the phone warning me about the new software being available all the time (so annoying). Thanks for any input.