In a greased 11-in. x 7-in. x 2-in. baking dish, combine the broth, rice, Italian seasoning and garlic powder. Cover and bake at 375 degrees F for 10 minutes. Add the broccoli, Parmesan cheese and half of the onions. Top with fish fillets; sprinkle with paprika. Cover and bake 20-25 minutes longer or until the fish flakes easily with a fork. Uncover; sprinkle with cheddar cheese and remaining onions. Return to the oven for 3 minutes or until cheese is melted.