01 - Preheat the oven to 400°F. Lightly grease a 9x13-inch baking dish with olive oil or cooking spray.
02 - In a small mixing bowl, combine the softened goat cheese, chives, parsley, minced garlic, lemon zest, 1/4 teaspoon black pepper, and a pinch of salt. Stir until smooth and well blended.
03 - Using a sharp paring knife, cut a deep horizontal pocket into the thickest side of each chicken breast, being careful not to slice all the way through.
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 contained.
05 - Rub the outside of each stuffed chicken breast with olive oil, then season generously on all sides with 1/2 teaspoon salt, 1/2 teaspoon 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 the juices run clear.
07 - Remove the chicken from the oven, discard any toothpicks, and let it rest for 5 minutes before slicing and serving.