Probably one of the best places to eat in Vegas if you don't want to go to an overpriced Strip restaurant. Rosemary's is located in a strip mall in Summerlin and from the outside it doesn't look like much. Inside is simple as well with a the bar located in the very front and the main dining room behind it.
I've probably been here 5 times and have always enjoyed myself. The service is excellent and the food is even better. I usually get the Prix-Fixe dinner. I've tried the pork chop, veal tenderloin and the striped bass. All very good. A decent wine list as well rounds out the experience.
Costco sells gift certificates for Rosemary's at $80 for $100. Not always available at the Costco's in Vegas so order online before you go.