What makes a Mexican restaurant authentic?

Here are a few key signature aspects of traditional Mexican cuisine to help you distinguish authentic Mexican from Tex-Mex dishes: fresh and healthy ingredients such as tomatoes, chilies, not jars of store-bought salsa for example, traditional spices (such as coriander and epazote) instead of cumin or dry oregano. Every dish is traditionally prepared using recipes and culinary methods steeped in the heritage of Mexico.