Mushroom-and-Swiss Sliders with Spicy Fry Sauce

I went berserk the other night, whipping up some scrumptious sliders and topping them with some wine-soaked mushrooms and Swiss cheese. What can I say? I was feeling mischievous.

To slather on the slider buns—which were actually just storebought dinner rolls split like hamburger buns—I whipped up some spicy fry sauce. And for those of you who don't know what fry sauce is…then you've never been to Utah or eaten fries late at night in a college dorm mess hall.

Fry sauce is nothing more than...