What used to be called the Tohono Chul Park Tearoom is now the Tohono Chul Garden Bistro and a new management team is running it. The food sounds quite good, too, especially if you're into fresh seasonal fare. From the Garden Bistro website:
Each dish is plated to look as lovely as the gardens surrounding the Bistro and the flavors are amazing, truly! We can’t wait to welcome regulars of the Tea Room and to also re-introduce patrons who haven’t visited in a while. The menu will change seasonally, and even daily, based on what local, organic fresh ingredients the chef can obtain. The management will be visible in the dining room and on the patios and look forward to getting to know our guests. The light summer fare menu offers some favorites, but there will also be great variety based on market conditions. The Garden Bistro is open from 7 a.m. to 3 p.m. beginning July 1st for summer hours.