Preheat your oven to 400°F and pat the chicken breasts dry with a paper towel to remove excess moisture.
Using a sharp knife, cut a horizontal slit into the thickest part of each chicken breast to create a pocket. Be careful not to cut all the way through.
In a small bowl, mix paprika, oregano, garlic powder, onion powder, salt, and pepper. Rub this seasoning mixture evenly over both sides of the chicken breasts.
Prepare the filling by combining spinach, feta, ricotta, scallions, minced garlic, and dried dill in a separate bowl. Mix until well combined.
Stuff each chicken breast with the spinach-feta mixture. Secure the pockets with toothpicks to prevent the filling from spilling during cooking.
Heat olive oil in a large oven-safe skillet over medium-high heat. Sear the stuffed chicken breasts for 3-4 minutes on each side until golden brown.
Transfer the skillet to the oven and bake uncovered for 15-18 minutes until the chicken reaches an internal temperature of 165°F.
For additional browning, broil for 1-2 minutes before removing from the oven.