Miso Marinated Chilean Sea Bass

1.Mix miso, mirin, rice vinegar and sesame oil together until smooth.
2.Use the miso mixture to marinate Chilean Sea Bass fillets for at least an hour or overnight for a stronger flavor.
3.Set oven to broiler on high. Broil fillets in oven for about 10 minutes. A minute or 2 longer if you want a darker caramel color on top.
4.If the fish is very thick broil for an additional 5 minutes moving the fish to the lowest rack to prevent burning.
5.Sprinkle green onions over fillets and serve with vegetables and rice.