01 - Preheat oven to 375°F (190°C). Line a baking dish with parchment paper or lightly grease the surface.
02 - Heat 1 tablespoon olive oil in a skillet over medium heat. Sauté minced garlic and chopped spinach until wilted, about 2 minutes. Remove from heat.
03 - In a bowl, combine sautéed spinach, cream cheese, crumbled feta cheese, and chopped dried cranberries. Season with 1/4 teaspoon salt and 1/4 teaspoon black pepper, then mix thoroughly.
04 - Using a sharp knife, carefully cut a pocket into the thickest side of each chicken breast, making sure not to cut through the opposite side.
05 - Evenly distribute the spinach-cheese filling into the pockets of each chicken breast. Secure openings with toothpicks 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 seasoning mixture evenly over all sides.
07 - Arrange the stuffed chicken breasts in the prepared baking dish. Bake for 25 to 30 minutes, or until chicken is fully cooked and juices run clear (internal temperature should reach 165°F/74°C).
08 - Remove toothpicks from the chicken. Allow the chicken breasts to rest for 5 minutes before serving.