1) P.F. Chang's Chinese Bistro has a small patio with a commanding 5 mile view of the valley below and Double Oak Mountain in the background.  In nice weather, eat on this patio as it is very quiet in contrast to the boisterous environment inside this perpetually busy restaurant.  If the weather is good when you are here and you like good Chinese food, go there without a doubt.  (The restaurant now takes reservations...)

2) The Cheesecake Factory is located above P.F. Chang's in the Summit shopping center and has a similar small outdoor patio.  Same contrast with the extremely busy and noisy interior of this restaurant and an even better view of the valley and mountains beyond.  The Cheesecake Factory has an extremely broad menu at very reasonable prices.  This restaurant does not take reservations and is perpetually busy, so get there early and be patient.