Preheat oven to 425°F Spray a baking sheet with cooking oil.
To make the glaze, combine the miso, orange juice, soy sauce, oil, sugar and orange zest in a small bowl.
Remove 2 tbsp of the glaze and brush lightly over the slamon. Sprinkle with the sesame seeds.
Place salmon on prepared baking sheet, and bake for 10 minutes (per inch of fish) or until the fish flakes when pierced with a fork. Serve with the remaining sauce on the side. Garnish each fish with a sprinkling of green onions and cilantro.