Preheat the oven to 375 degrees.
Trim the excess fat off of the chicken thighs.
In a large oven proof skillet, heat the olive oil over medium to medium-high heat.
Lay the chicken thighs out on a plate. Evenly sprinkle with salt, pepper, garlic salt, and cumin. Turn the chicken thighs over and do the same to the other side.
Lay the chicken thighs flat in the pan and let them begin to cook., about 5-7 minutes. Once they have browned, turn them over and let the reverse side cook, about 4-6 more minutes.
Immediately move the whole skillet into the oven to let the chicken cook all the way through. Cook for about 5-7 minutes, or until all pinkness is gone from the inside of the chicken.
Remove the chicken from the oven and cut into approximately 1 inch pieces. I place the chicken thighs on a cutting board and given them a very rough chop all over.
Prepare the topping ingredients of your choice.
Lay out the toppings and chicken in separate bowls. Lay out the tortillas or shells, and let your guests build their own chicken street tacos!