01 -
Preheat the oven to 190°C.
02 -
Pat chicken breasts dry with paper towels. Slice a pocket into each breast with a sharp knife, being careful not to cut all the way through.
03 -
Rub chicken breasts with olive oil, salt, black pepper, garlic powder, and onion powder.
04 -
Combine shredded mozzarella, pepperoni slices, marinara sauce, and Italian seasoning in a bowl. Mix well.
05 -
Carefully spoon the filling mixture into each chicken breast pocket. Secure with toothpicks if needed.
06 -
Arrange stuffed chicken in a lightly greased baking dish. Bake for 30–35 minutes until the chicken is fully cooked and internal temperature reaches 74°C.
07 -
Let the stuffed chicken rest for 5 minutes before removing toothpicks.
08 -
Garnish with freshly chopped basil if desired and serve warm.