This is a wonderful fusion dish that seems advanced and complicated but is SO easy to make (and sure to impress)! Please use the highest quality, sushi-grade ahi tuna for best results. Also, I have made this using a Thai chili or a Serrano chili-- both are great, so it is whatever you prefer. The creamy, beautiful taste and texture of the tuna is complimented so well by the heat from the chili and the savory combination of Mexican and Asian flavors-- it is amazing. If you are a fan of Ahi tuna, I guarantee that this will be one of your favorite recipes! Serve it with some fresh homemade margaritas... or some chilled sake-- whatever you prefer! Enjoy!