If you guessed McDonald's French fries, you guessed correctly. It had been a long time since I'd eaten at McDonald's when I read about Jack and French fries, yet I remembered them as being quite tasty. Sadly, when I tried them, they weren't as good as I remembered them. No doubt, they changed to a healthier oil for frying.
We have to wonder what Marie thought about his affinity for fast food. We also have to wonder how he managed to keep that trim figure.