Condiments by FlaxmanR

Question 8

Endemic mostly to the western United States, where it was invented in the 1940s, this condiment is, at its most basic, a mixture of ketchup and mayonnaise, although other spices are usually added. What regional condiment is probably most popular and ubiquitous in Utah, where even national chains like McDonald's offered it at times, and especially at the restaurant chain that claims the original invention, Arctic Circle?

Fry Sauce