Miso and Soy Chilean Sea Bass

Preheat an air fryer to 350 degrees F (175 degrees C).

Whisk together sake, mirin, miso paste, brown sugar, and soy sauce in a bowl. Place sea bass fillets in a large resealable plastic bag; pour marinade over fillets. Chill in the refrigerator for 3 to 6 hours.

Preheat the oven's broiler and set the oven rack about 6 inches from the heat source. Prop the oven door to remain slightly ajar.

Arrange fillets on a baking sheet; discard marinade.

Broil sea bass in the preheated oven until fish flakes easily with a fork, 7 to 9 minutes.

Sprinkle with chopped green onions to serve.