There's no way they'll let him get a rematch for something that's entirely irrelevant to the task at hand.
What he's likely to realize is that he's not just competing to make a good dish, but to attract the attention of people to actually try it. The people aren't forced to eat everything at a buffet, so your first goal is to attract their interest in some way so they'll pick your food. His food right now is basically a plain omelette, which is boring in comparison to everybody else's food.
Entirely probable that he starts cooking it flaboyantly to attract attention, rather than actually modify it. I'm just sure he's going to adapt rather than fail and try to scramble back in.
Edit: im wondering if I should have spoilered this...
DanMachi 13.