01 -
Preheat the oven to 190°C (375°F).
02 -
In a small bowl, combine olive oil, garlic powder, onion powder, dried oregano, paprika, salt, and pepper to create the seasoning mixture.
03 -
Cut a horizontal slit through the thickest part of each chicken breast, being careful not to cut all the way through. Open each breast like a book.
04 -
Thoroughly rub the seasoning mixture over all surfaces of the chicken breasts.
05 -
In a medium bowl, mix chopped spinach, diced roasted red peppers, shredded mozzarella, minced garlic, grated Parmesan, salt, and pepper until well combined.
06 -
Distribute the filling mixture evenly among the butterflied chicken breasts, then fold each breast over to enclose the filling.
07 -
Transfer the stuffed chicken breasts to a baking dish. If necessary, secure with toothpicks to prevent filling from escaping.
08 -
Bake in the preheated oven for 25-30 minutes, until chicken is thoroughly cooked and internal temperature reaches 74°C (165°F).
09 -
For a golden brown finish, broil for an additional 2-3 minutes.
10 -
Remove toothpicks before serving hot.