The first thing that you need is to get 3-4 chiles roasted, peeled and seeded. If you are lucky, the Hatch Chile Store already did this for you. If not you will need to roast, peel and seed the chiles yourself.
In a large bowl, mix the ground chuck and chiles. Mix well with your hands.
Then divide the meat equally into four portions and then form four patties.
Grill the burgers over direct high heat for about 4-5 minutes on each side (for medium).
Flip once. The more you flip the burger, the more juices run out, the dryer the burger. So, flip once.
During the last minute, add a slice of pepperjack cheese to each burger.
Place the burgers on a bun with lettuce, tomato and avocado slices.
Time to enjoy!