I find a lot of really good food options at DAK, so don't see a point of leaving just for lunch. Either way, you will take a bus, taxi, or Uber. Not worth it to me for lunch.
My DD and I love Yak & Yeti counter service, but their table service looks nice. We also like Flame Tree (we like counter service, in case you can't tell). But you have Rainforest Cafe and Tusker House.
I wouldn't waste time just for Saana. It looks okay, but my friend that ate there said it was just that, okay. Not worth the travel time.