01 -
Preheat oven to 375°F (190°C) and grease a 9×13-inch baking dish with olive oil.
02 -
Combine olive oil, Italian seasoning, red pepper flakes, garlic powder, onion powder, and ½ teaspoon of salt in a small mixing bowl. Mix well and set aside.
03 -
Place chicken breasts on a cutting board. Carefully insert a knife into the thickest part of each breast to create a pocket, about 4 inches wide. Do not cut all the way through.
04 -
Rub the prepared seasoning on all sides and inside the pockets of the chicken breasts. Refrigerate to marinate until ready to use.
05 -
In a bowl, mix ricotta cheese, grated mozzarella, grated Parmesan, chopped spinach (steamed and drained), minced garlic, and remaining salt. Season with pepper to taste.
06 -
Remove marinated chicken breasts from the refrigerator. Stuff each pocket with the cheese mixture and secure with toothpicks if needed.
07 -
Place stuffed chicken breasts in the prepared dish. Bake for 25 minutes, flipping halfway through to ensure even browning. Alternatively, cook on the stovetop.
08 -
Remove toothpicks and serve warm. Enjoy your delicious stuffed chicken!