01 - Set oven to 400°F and line a baking dish with parchment paper or lightly grease it.
02 - Heat a skillet over medium heat, add chopped spinach, and cook for 2-3 minutes until wilted. Remove from heat and cool slightly.
03 - Squeeze out excess moisture from spinach, then combine with feta, cream cheese, garlic, dill, parsley, lemon zest, salt, and pepper. Mix until well incorporated.
04 - Pat chicken dry and cut a horizontal pocket into the thickest part of each breast without slicing through completely.
05 - Fill each pocket evenly with the spinach mixture and secure openings with toothpicks if necessary.
06 - Brush chicken breasts with olive oil, then season both sides with paprika, salt, and black pepper.
07 - Arrange stuffed breasts in the baking dish and bake for 25-30 minutes until internal temperature reaches 165°F and juices run clear.
08 - Allow chicken to rest 5 minutes before removing toothpicks and serving.