Morty's, right up the street from the stadium and a decent burger joint
Herm's, american diner only about a mile from campus
Crumb Brothers, great sandwiches and pastries, its on the south side of town and a good stop before you drive up to the stadium
Italian Place, sandwich joint like the one in utah county, a block off main right next to the tabernacle
Logan's Heroes, sandwich place that looks like a dive but has great sandwiches, right on main street
The Crapery, sweet and savory crapes, on main st on the south end of town
Waffle Iron, waffles like Waffle Love, on center street about a block west of the tabernacle

USU also has a few food trucks in front of the stadium at their tailgate area for a couple hours before kickoff.