This place was amazing, we went a while ago so I don't have to many vivid details. I do remember the server had a lot of respect for the chef/owner (which says a lot) and was awesome.
The warning we got there was important too. If you look up something on your phone, it will not be that similiar to what is on the menu. We looked up two or three things and the server caught us and explained the differences between the "traditional" or google version and the one at Momocho.
So if you want to ask without giving away that you have no idea about mexican foods that aren't from Taco Bell, just say "I have heard you make things different here, can you tell me about the ..."