Earl of Sandwich in Planet Hollywood.
Hands down, one of my favorite "fast" food places in Vegas on the Strip (off the stripe it is In-and-Out). I would stay at PH again just so I could stop by Earl's on the way back up to our room. I was in Vegas for two days and I ate at this place THREE times! Their salads and HOT sandwiches are just that good!
This review is based solely on my personal experience and reflect my personal opinions. Your experience may be completely different.