Around the turn of the century, PBS made a documentary about this immigrant group called "Roots in the Sand"
I also really loved this article on the food-side of Punjabi-Mexican culture:
California’s Lost (and Found) Punjabi-Mexican Cuisine https://www.eater.com/2019/4/23/18305011/punjabi-mexican-mig...
BTW Chinese five-spice makes a good "tail end" of spices for curry. My secret curry weapon.