Preheat your oven to 375°F (190°C) and lightly grease a baking dish with olive oil.

Blanch chopped broccoli in boiling water for 3 minutes; drain and finely chop.

In a bowl, combine broccoli, cream cheese, shredded cheese, garlic powder, salt, and pepper until mixed well.

Slice each chicken breast horizontally to create a pocket; stuff generously with the broccoli mixture.

Place stuffed chicken in the baking dish. Drizzle olive oil over each piece and sprinkle panko breadcrumbs on top.

Bake for 25-30 minutes until golden brown and cooked through (internal temperature should reach 165°F).

Let rest for 5 minutes before slicing and serving.