Jaisal Treat is a 2 story restaurant on top of the Hotel Shree Govindam, Geeta Ashram Road. The top floor offers great desert sunset views plus good views of the fort, and ,if it's not windy, is a great place for drinks at  the end of the day.
The restaurant seems to be popular with German tourists,  offers very good food and attentive service, and is priced reasonably.
Good value for the money.