I'd recommend a lunch or dinner at Planet Dailies down in the casino at Planet Hollywood. They have a croissant french toast that's absolutely killer!!
I'll second the vote for BLT Burger at Mirage.
Also recommend Lombardi's in the very back of the Miracle Mile shops at Planet Hollywood (across from the variety show theatre). Terrific Italian food.
If you want a coffee shop that's expensive but amazingly tasty, try the Terrace Pointe Cafe at the Wynn (best hash browns ever!).