Gonna be honest never herd of frais grois, had to look it up.
Next before you get to reading the next part, when i asked what you had in mind i originally had intended to have a completely positive response, and try to incorporate it into my game Bob, however after finding out what you had in mind, i had to immediately do a double take as to how i was going to incorporate it, while having it make sense to be there.
Both of these are such specialty foods/delicacies and would require either a specific plot element for fine dining in a game, and also the characters i’d imagine would need to have a taste for these. Game makers and writers i feel like would have to go out of their way to include food items like these, which is probably why it’s not seen. Also weight gain and caviar are not two thoughts that go together generally. From the stand point of a weight gain game. While having food diversity is a fantastic idea, doing so probably needs to stay in the realm of, it makes sense that the character trying to gain weight is going to want these, or makes sense that they would be eating that item for the purpose of weight gain. Lastly on the point of keeping things reasonable, game developers either need limited selection to keep things moving in game, or have limited time to add more options, so food diversity is a balancing act.
I had imagined you would say something like chicken parmesan or Chicken Tikka Masala, or something more common but still not commonly seen in wg games. Please don’t mistake my response here as to saying im not all for food diversity, however more as to pointing out its not as easy as, at least i had assumed at first glance or thought, when i asked you what you had in mind.