Fries

Flying Fish drop it, which means Hardmode rain rather than anything you can go looking for. The buff sits in the middle tier of food rather than the weakest one, so if a few fall into your lap during a storm they are worth eating instead of selling.

The carton is drawn after McDonald's packaging, with the yellow T standing in for the golden arches, and the tooltip asking after ketchup fits the same joke. Then there is the source: fried potatoes dropped by a fish is fish and chips, the battered takeaway staple across the English speaking world and about as close as England gets to a national dish.