but I don't understand what they meant by a Bocuse dish.
I believe they meant something in the spirit of the Bocuse d'Or---that is, perfectly executed, perfectly presented, and, ultimately, tasting good. Keep in mind, with a challenge like that, the flavors had to balance not only within each dish, but also between the three dishes.
Not an easy thing to do, period. Throw the time constraint in on top and wow! It's like a dancing bear---the wonder isn't that he's so graceful, but that he can even do it at all.
They have taken the oath of the brother in blood, in leavened bread and salt. Rudyard Kipling