Funny you mention hot sauce because I to noticed the same thing during this slow recovery. I drank hot sauce and purchased some of the hottest stuff on earth during the past year (not recommended
). When I noticed the stimulation the way you desribe it while I ate hot spicy stuff, I continued to eat more. My co-workers and I go to some really dive taquerias that have some very hot sauce for most people. They always commented and asked me how in the heck I ate all that hot sauce. I guessed it helped having partial paralysis on my taste buds to. The more you stimulate the nerves the better regardless of how you do it.
I believe getting some natural sun on your face helps to. I also purchased a back massager (one of those hand held ones at Target when my movement started to return. My therapist recommended some kind of massage stimulation. It has the red led lights on the end and heats up. I use that on my face, forehead, and the corner by my nose daily for a few minutes. I also take Centrium Vitamins, Omega 3-6-9, and Vitamin B-12 liquid.
I also pushed my tongue against the roof of my mouth a lot prior to my returning movement. It somehow stimulated my jaw muscles. I don't eat so much hot stuff any more but I swear it helped.