In a large bowl, whisk together the miso, mirin, ginger, rice vinegar, sesame oil, and soy sauce.
Add in the salmon fillets, and turn to coat. Cover and marinate for 1-3 hours in the refrigerator.
Preheat oven to broil. Line a baking sheet with foil, and mist with cooking spray.
Transfer the salmon to the baking sheet and place on the middle rack of oven. Broil 8 -10 minutes or until fish flakes easily with a fork and outside is slightly charred.
Notes
The entire recipe makes 6 servingsThe serving size is 1 salmon fillet