01 - Preheat oven to 400°F. Lightly grease a baking dish with olive oil or cooking spray.
02 - In a small mixing bowl, combine the softened goat cheese, chopped chives, parsley, minced garlic, lemon zest, 1/4 tsp black pepper, and a pinch of salt. Stir until smooth and well blended.
03 - Using a sharp knife, carefully cut a deep pocket into the thickest part of each chicken breast, being careful not to cut all the way through to the other side.
04 - Divide the goat cheese filling evenly among the four chicken breasts, spooning it into each pocket. Secure the openings with toothpicks if needed to keep the filling enclosed.
05 - Rub the outside of each stuffed chicken breast with olive oil, then season generously on all sides with 1/2 tsp salt, 1/2 tsp black pepper, and paprika if using.
06 - Arrange the stuffed chicken breasts in the prepared baking dish and bake uncovered for 25 to 30 minutes, until the internal temperature reaches 165°F and juices run clear.
07 - Remove from the oven, discard any toothpicks, and let the chicken rest for 5 minutes before slicing and serving.