When exploring authentic Mexican recipes, many are delighted with the vast breadth of ingredients found in the cuisine, that originate from literally all over the world. I found this article particularly interesting, that explains the origins of many of the ingredients we see in modern authentic Mexican cuisine, today:
Many of the foods we find in the Mexican pantry carry ancient pedigrees. Beans, tomatoes, corn, and chile peppers--staples of Aztecs and Mayans--rank among the world's first cultivated foods. Later, Spanish conquerors introduced wheat, herbs, spices and dairy foods to the pantry. Over the centuries, Mexican cuisine has emerged out of this mingling of ingredients and techniques.