Let the salmon sit out at room temperature for 15 minutes before cooking. This will help you get a more even cook on the salmon.
With the oven rack in mid position, preheat the oven to 425º F.
Line a baking sheet with parchment paper and place the salmon fillets on top. Then, lightly pat the fillets with paper towels to get rid of any excess moisture.
Sprinkle a little bit of salt over the fillets.
With a fork, whisk all of the ingredients for the miso glaze in a small bowl until it's cohesive and a sauce forms. Add a bit of water, and mix it again until smooth.
Brush a generous amount of the glaze over the salmon fillets.
Bake the fillets in the oven for 12 minutes or until the internal temperature registers at 140º F.
Finish the fillets off by garnishing them with sesame seeds and thinly sliced scallions, and enjoy!