Trying to recreate Moustache's spinach and chickpea deliciousness

Hi! I'm new to the boards, and although I've been reading for a while, I was compelled to post for the first time today. I used to live in Manhattan (since moved far upstate), and still remember how much I loved the spinach and chickpea dish at Moustache (they call it a "salad," but I recall it as having all been cooked together -- here is the URL for the menu: http://www.moustachepitza.com/salads....).

It has (as the menu says) tomatoes (or tomato sauce), lemon juice, and onions (which had been cooked, if memory serves). I read online in a posting on Chow.com from 2003 from someone re-creating this same dish that it may also have had harissa.

It was so, SO very good. I have been looking all around for a recipe approximating this -- I bet it's simple, and I would be thrilled if someone either had the recipe or a close approximation.

(If I've posted in the wrong place, please let me know that too!)