01 -
Set oven temperature to 190°C (375°F).
02 -
In a 2.5-quart (28x18 cm) baking dish, place chicken, zucchini, spinach, cherry tomatoes, sun-dried tomatoes, shallot, garlic, olive oil, oregano, basil, garlic powder, salt, black pepper, paprika, and red pepper flakes.
03 -
Toss all components until evenly coated with seasoning.
04 -
Evenly sprinkle shredded mozzarella and grated Parmesan over the mixture.
05 -
Cover the dish with aluminum foil and bake in the preheated oven for 20 minutes.
06 -
Remove the foil and continue baking uncovered for an additional 10 minutes.
07 -
Set oven to broil on high and broil the casserole for 1 to 2 minutes until the cheese turns golden, monitoring every 20 seconds to prevent burning.
08 -
Sprinkle chopped fresh parsley atop before serving. Optionally add a pinch of oregano, black pepper, and red pepper flakes to taste.