Heat the olive oil in a skillet
over medium-high heat until hot. Season the chicken breasts on both sides with the kosher salt, ground black pepper, and garlic powder, and then add to the hot pan. Cook, flipping occasionally, until the chicken is well-browned on both sides and cooked through, about 10-12 minutes, or until the inside reaches 160 degrees Fahrenheit. Once cooked through, remove from the pan and let cool. Then, dice into bite-sized cubes.