Prep oven. Arrange top oven rack so that its 5-6 inches from the heat source at the top. Pre-heat oven by pressing the BROIL function on high heat for 10 minutes.
Make marinade. In a medium bowl, add miso paste, maple syrup, mirin, sesame oil, and minced ginger. Whisk until smooth. Remove 1/4 cup of the marinade and set aside in a small bowl for later.
Add salmon. Add salmon segments, one at a time, to the marinade. Turn gently to coat the salmon on both sides. Transfer salmon to a parchment-lined sheet pan. Make sure there's a little space between the salmon pieces.
Broil salmon. Transfer the sheet pan to the oven and broil for 6-8 minutes, rotating the sheet pan about halfway through. Watch carefully so it doesn't burn! The salmon is cooked when the top is caramelized with charred little bits and the flesh is opaque and flaky, but still moist and slightly shiny on the inside.
Brush reserved marinade. Remove salmon from the oven and immediately brush on the reserved glaze/marinade to the salmon.
Serve. Optional: garnish with sesame seeds. Serve with rice and steamed veggies of choice. Enjoy!