Steak and eggs is a staple of drunk or "been drinking a bit so now I'm really hungry" food in Las Vegas.
While there are a few choices in Vegas I always choose Marilyn's Cafe at the Tuscany because its 1. close by to the strip 2. its not crowded, no wait in line 3. it taste OK.
Your steak and eggs is $4.99 from something like 11pm - 5am, consist of a 6ish oz steak, two eggs, hash browns, and toast. Pretty basic, but a core essential in waking up without a hangover.
I've had the other food before on their extensive menu and it gets a pass.
If you do come here for steak and eggs they no longer allow bill splitting during steak and eggs time so bring CASH.