Well, let's look at it this way...Zoya chose Arshad's biryani because it was simple and she could eat it everyday...she commented on how Adi's biryani had so many different flavors and spices and was meant to be served for a king
Zoya wants a simple life but simple can be boring as well - while Arshad can be a calm constant providing the same simple biryani...Adi is a perfect storm, someone who will show her the different colors of love and life..nothing will be dull around him and definitely not with him.