The origin of the grinder sandwich on TikTok is somewhat of a mystery. While many people have shared their own versions of the popular sandwich on the social media platform, it's difficult to pinpoint exactly who first came up with the idea. Some credit the sandwich to a user named @cookingwithayeh, who posted a video of her version of the sandwich in 2020. However, others claim to have been making similar sandwiches for years before the trend took off on TikTok. Regardless of who invented it, the grinder sandwich has become a viral sensation on the platform, with countless users putting their own spin on the classic sub. From loaded Italian grinders to vegan options, there's no shortage of delicious grinder sandwich recipes to be found on TikTok.