Preheat the oven to 425 degrees Fahrenheit.
Cut each of the four chicken breasts lengthwise to form a pocket. Be careful not to cut all the way.
Place the chicken breasts in a large mixing bowl, add 1 tablespoon of olive oil and sprinkle the meat with salt, black pepper, garlic powder, onion garlic and paprika. Gently mix the meat and spices using a spoon or your hands. Make sure to season both the outside and inside of the chicken breasts.
Place ¼ of the prepared stuffing inside each chicken breast. Close the pocket and secure the cut side with 2-3 toothpicks.
Heat the remaining 1 tablespoon of olive oil in an oven proof skillet (I use a cast iron skillet) and saute the chicken for 4-5 minutes per side over medium heat.
Then, transfer the skillet with chicken breasts in the preheated oven for 15-20 minutes, or until meat thermometer inserted in the thickest part of the chicken breast.
Trasfer the meat onto a platter and cover with aluminum foil.