Pound out the chicken breasts so that they are 1 inch thick. Season each side of the chicken with salt, pepper, garlic powder, and onion powder.
Heat a tablespoon of olive oil in a frying pan on medium-high heat. Once hot, add the chicken and cook on one side for about 4-5 minutes, until it is starting to brown. Then flip the chicken and cook for another 3-4 minutes, until the chicken has reached an internal temperature of 165° F.
Remove the chicken from the pan and cover. Allow to sit for about 10 minutes before cutting. Then cut the chicken in strips, cutting against the grain.
Add the spring mix, kale, and all other toppings to a large bowl and mix thoroughly. Add the dressing, and enjoy!