The Ramen Guru is a reference to the classic foodie film Tampopo (1985) by Juzo Itami, a collection of loosely connected vignettes around a central storyline about a ramen shop. This is a reference to the story of an old Ramen Master that our protagonists are reading about. Someone uploaded just that scene (It's famous) to youtube. https://youtu.be/6WrkdTrrwew?si=-SvJYDXqFZlLANTm