I am looking for a great place with authentic mexican food in the hotel zone. Nothing gourmet please.
Next to the Catholic Church in the Hotel Zone there's a place called Carnitas Michoacan. Try it. We like it.
Are you looking at a particular resort or the area itself?
Casa De Los Abeulos! It was recommended to us as a place that local eat. Reminded me of a US fancy Diner. Food was amazing and reasonably priced. There is more than one location
I would take the bus to the center and explore a bit. That is where you will find the small authentic places, not the Hotel Zone. Doubt many locals ever eat in the Hotel Zone.