First, roast the hatch chilies. While they cool, make the remaining ingredients.
Pour the avocado oil into a large sauté pan and swirl the pan to coat (or spray with avocado oil cooking spray). Turn heat to medium; once warm place the bell peppers into the pan with a pinch of salt. Let cook until softened and slightly caramelized – approx. 8-10 minutes.
Then, move the bell pepper to the sides of the pan and place the ground chicken in the middle and break up with a wooden spoon. Let cook 2 minutes and then continue to break apart and stir. Add cumin through salt and stir to combine the chicken, bell peppers and seasonings. Be sure chicken is cooked through but breaking apart a larger piece and making sure it is white/not pink in the middle. Remove from heat and add in hatch chilies. Toss to combine.
Spoon chicken and pepper mixture into lettuce pieces in desired amounts.
Top with grated manchego or goat cheese crumbles and serve.