Authentic Mexican restaurant cooking?

I have a question about the different types of mexican cuisines. In my hometown, there are several mexican restaurants with the same menu and all the food tastes the same. They all have a Speedy Gonzales lunch combo, the plates are crammed with enchiladas/burritos, tacos, rice, and beans, and they serve items such as tostaguacs. The enchiladas and burritos are filled with ground beef and topped with a certain type of sauce. The rice does not have a tomato texture to it, it almost has a red chile and garlic taste to it. Anyway, the food is probably very comforting and fattening. What style of mexican food is this?