Preheat oven broiler. Grease broiling pan or line with aluminum foil.

Mix Parmesan cheese, butter, mayonnaise, and lemon juice together in a small bowl.

Season fish with pepper and salt.

Arrange fillets in a single layer on prepared pan.

Broil a few inches from the heat for 2 to 3 minutes. Flip fillets over and broil for 2 or 3 minutes more. Remove fillets from oven and cover with Parmesan mixture on top side.

Broil until fish flakes easily with a fork, about 2 minutes.

Rinse the starch off the rice in a strainer under cold water for 30 seconds.

Bring the water to a boil over high heat in a large pot that has a tight fitting lid.

Add the rice, stir it just once, and boil, covered, for 30 minutes.

Pour the rice into a strainer over the sink and drain for 10 seconds.

Return the rice to the same pot, off the heat.

Cover immediately and set aside for 10 minutes (this is the steaming part).

Uncover, mix in butter, and season with salt and pepper.