Slowly being driven nuts trying to remember which SF story had mention of drinking tea with rancid yak butter.
Seems it was someone from the Himalayas the protagonist had befriended while at school/in training, but I just cannot place it.
The feel I have for it was the protagonist was leaving [school, training] and remembering two brothers there who drank tea with rancid yak butter, and shared it with him, but that's ALL I can dig out of my memory.
Feels like a Heinlein Juvenile, but I don't think it is. Maybe Frederik Pohl?