I had a good meal at Persepolis: https://goo.gl/maps/VwsvFGveEvk

The restaurant was oddly deserted when I went there; empty when we arrived, almost empty when we left, but food was good and service was efficient. Midrange style/price.

I have also eaten (assuming I've found the place correctly, it looks like I remember it and is in the right area) at Sadaf Iranian Restaurant: https://goo.gl/maps/2Kbp1B8nmZr Protip: if you want a handy meal and are passing by, get the cold lunch buffet. All sorts of Persian and general middle eastern salads and so on, and as much Iranian bread as you can eat. They have a hot buffet too, but I filled up on the cold one just fine. Slightly less style and price than Persepolis.

If you're intent on as much Iranian food as possible, perhaps do Sadaf for lunch and Persepolis for dinner.