01 - Preheat oven to 400°F. Line a baking sheet with parchment paper or lightly grease to prevent sticking.
02 - In a small bowl, combine garlic powder, paprika, salt, and black pepper until evenly blended.
03 - Pat chicken breasts dry with paper towels. Use a sharp knife to carefully cut a pocket into each chicken breast, keeping the sides intact.
04 - Rub each chicken breast with olive oil, then apply seasoning mixture to the surface and inside the pockets.
05 - In a separate mixing bowl, combine finely chopped broccoli, shredded cheddar cheese, softened cream cheese, grated Parmesan, Dijon mustard, and minced garlic. Mix until smooth and evenly distributed.
06 - Evenly distribute the broccoli-cheese filling into the pockets of each chicken breast. Secure openings with toothpicks if necessary to retain filling.
07 - Place the stuffed chicken breasts onto the prepared baking sheet, spacing them apart.
08 - Bake for 25 to 30 minutes until chicken is fully cooked and internal temperature reaches 165°F. The cheese filling should be melted and bubbling.
09 - Allow chicken to rest for 5 minutes. Carefully remove toothpicks before serving.