Preheat oven to 375°F
Layer chicken in a 9x13 baking dish
Season with garlic powder, onion powder, pepper, and salt
Add broccoli on top
Spread artichoke dip over everything
Cover tightly with foil and bake 35 minutes
Remove foil and add all three cheeses
Bake uncovered 10–15 minutes until golden and bubbling
Rest 10 minutes before serving
