This is probably an unnecessary use of genius but I won’t deny the awesomeness of turning a taco into a vehicle for hamburgers and fries. That is, the fries become the taco shell that holds the burger food together. The form of a taco is nearly perfect and the taste of a hamburger is unbeatable (it is true vice versa too), so melding two perfect things together very probably breaks reality. Worth it if it tastes good.
The french fry burger taco concoction was made by The Vulgar Chef. He writes:
The fries are prepared same as with the other fry recipes. I chop up some fries, mix them with shredded cheese, nuke them in the microwave for a good 30 seconds. Form the fries into the desires shape I need.
For the fry shells the desired shape is a circle. The easiest way to go about this is to lay the nuked cheesy fries out on a flat surface, and let cool slightly.