In all likelihood it wasn’t very well cooked at all. The Italian guy in that bell pepper battle was quite possibily the worst challenger in IC history, or at least in the episodes that FoodTV have shown. Note that they edited out the tasting of the rack of deadly lamb. And the pasta “worms” in green sauce was in my mind the worst looking dish I’ve seen.
On a related note, in the Turkey Battle Morimoto prepared Turkey Sashimi. Definitely an eat at your own risk food even if the turkey was fresh, but then the Japanese think a potentially fatal fish is a delicacy as well. In the same battle the challenger cooked a whole turkey in a pig’s bladder. I don’t think it was cooked for more than 40 minutes, surely not enough time for it to be fully cooked, but perhaps enough for the outside of the turkey to be cooked well enough. Morimoto won by 1 point after the judges split 2-2.