Preheat oven to 275°F. Line a baking sheet with parchment paper and set aside.
Pat the salmon dry and season lightly with salt and pepper.
4 (6-ounce) salmon filets
Arrange the salmon filets on the prepared baking sheet.
In a bowl, whisk together the miso paste, mirin, brown sugar, soy sauce, and sesame oil.
4 tablespoons white miso paste, ¼ cup mirin, 1 tablespoon brown sugar, 2 teaspoons low-sodium soy sauce, 1 teaspoon toasted sesame oil
Brush the salmon liberally with ⅔ of the sauce.
Bake for 20-25 minutes or until tender when a fork is inserted into the thickest part. Remove from the oven.
Brush with the remaining sauce and set the oven to broil.
Broil for 1-2 minutes to caramelize the sauce. Top with sesame seeds and green onions, and enjoy!
1 teaspoon sesame seeds, 2 tablespoons green onions