01 - Preheat oven to 375°F. Line a baking dish with parchment paper or lightly grease its surface.
02 - In a skillet over medium heat, warm 1 tablespoon olive oil. Add minced garlic and chopped spinach. Sauté until spinach softens and wilts, about 2 minutes. Remove from heat and set aside.
03 - In a mixing bowl, combine sautéed spinach, softened cream cheese, crumbled feta cheese, and chopped dried cranberries. Season with 1/4 teaspoon sea salt and 1/4 teaspoon ground black pepper. Mix thoroughly until well blended.
04 - With a sharp knife, carefully cut a horizontal pocket into the thickest part of each chicken breast, ensuring not to slice all the way through.
05 - Evenly spoon the spinach-cranberry cheese mixture into each chicken breast pocket. Use toothpicks to secure the filling if necessary.
06 - In a small bowl, combine paprika, dried thyme, 1/2 teaspoon salt, and 1/4 teaspoon black pepper. Brush chicken breasts with 1 tablespoon olive oil, then sprinkle the seasoning mixture evenly over all sides.
07 - Place filled chicken breasts into the prepared baking dish. Bake on the center rack for 25 to 30 minutes, or until chicken reaches an internal temperature of 165°F and juices run clear.
08 - Carefully remove toothpicks. Let chicken rest for 5 minutes before serving.