Smokin Roadside Grill - loaded mac'n'cheese (<-- my go-to for the past 2 years every game)
Sushi Burrito
Costa Vida (weird but tastes better at LES)
BLOX
There are about 2 or 3 Hawian/Teriyaki places.. all are good.
Also a handful of shaved ice places.
Food trucks are parked at about every entrance/corner inside the stadium.

.. and BYU Concessions has a handful of 'solid' choices (burgers, pizza.. etc)