Baguette de pain ouverte dans la longueur

Interesting problem. I was first thinking of anatomical terms used for x-rays, such as this: https://fr.wikipedia.org/wiki/Système_de_référence_en_anatomie

But that didn't work. What also didn't work was trying to get Firefly into the mood of preparing a sandwich, but maybe I didn't try hard enough (also imn cooking recipes nobody describes exactly how to slice the bread unfortunately). Can you make a sketch and then use that in Photoshop for your prompt? https://www.youtube.com/watch?v=uzU2iYht3VU