How do restaurants turn spuds into spiral strings of curly fries, and what goes into that thick, punchy seasoning on top?

Arby's iconic seasoned curly fries and crinkle fries are sold in grocery stores across the U.S., found in the frozen section at select retailers.

In the South, we’ve got a real soft spot for a good batch of fries — so it’s not surprising that we got more than 50 ...