which is a TS location has a beautiful interior. The food is not that great in my opinion, but it does have its fans.
San Angel Cantina is a better than average fast food sort of place. You can sit outside and overlook the lagoon or people watch while you sip your Maragrita and eat. El Pirata in the MK also has good fast food type of Mexican. It's open sparingly. For example, we were there in June when it was very busy and it was open from 12:00 - 3:00 PM only.
There is nothing like a Frontera Grill available.