The green chile powder in this recipe is not required but I think it makes this sandwich extra special and one step closer to the Bocadillos version. A tablespoon or two of roasted and chopped green chile would be even better but the powder is much easier to keep handy in the RV pantry to grab at any time.
If you are ever in the Albuquerque area go see Marie Yniguez, co-owner of Bocadillos, at 1609 Indian School Rd NW, Albuquerque NM 87104 near 12th Street and Menaul. This amazing woman makes over a thousand charter school lunches every weekday before opening up the sandwich shop for the lunch crowd. Parking behind the restaurant is very limited. Small RVs can park behind the Lottaburger next door. Larger rigs will need to take the tow car or park in the neighborhood side streets.