First, clean any fat off of the chicken breasts.
Second, lay the chicken breasts on a cutting board to season.
Third, season one side of the chicken breasts with garlic, onion, chili powder, cumin, and Tony's.
Next, put butter in a cast iron skillet, or non-stick skillet and let it melt on medium heat.
Then, place the seasoned side of the chicken breasts into the hot skillet with melted butter.
Season the other side of the chicken breasts in the pan with garlic, onion, chili powder, cumin, and Tony's.
Flip the chicken over when it has gotten a nice color/crust. Be sure to not let it burn.
Once the chicken has a nice color/crust on the second side, add 1/2 water to the hot skillet and place a lid on it. This will ensure that your chicken is completely cooked on the inside but still juicy. Let the chicken cook with the lid on until done.
Finally, take the cooked chicken out of the skillet, place it on a clean cutting board, and slice or shred it.