The McRib: Enjoy Your Symptom.

“It is a cornmeal quenelle, extruded at a high speed, and so the extrusion heats the cornmeal ‘polenta’ and flash-cooks it, trapping air and giving it a crispy texture with a striking lightness. It is then dusted with an ‘umami powder’ glutamate and evaporated-dairy-solids blend.” (Via hubski.com.)