If needed, gently remove bones with tweezers. Cut salmon filet against the grain into 4 strips.
Start preheating your oven’s broiler and move the oven rack to be on the top row, about 6-8 inches (15cm) underneath.
In a small bowl mix butter, miso paste, garlic, and black pepper. Set aside.
Rub 1-2 Tablespoons of miso butter onto the broccoli and season with salt and pepper.
Use paper towels to pat dry each salmon piece on all sides. Sprinkle with salt and pepper. Use more salt and pepper if your salmon pieces are larger. Place the salmon pieces on the center of the rimmed baking sheet. To make clean up easy, you can line the sheet with parchment paper first if you prefer.
Rub about 1 Tablespoon of miso butter onto each salmon piece, coating each side. If the miso butter does not rub on easily, you can warm it in the microwave for 5 seconds or the preheated oven – careful since it will melt quickly and you don’t want that!
Sprinkle broccoli around the salmon on the sides of the pan.
Place pan in the preheated oven underneath the broiler and let it cook for 5-7 minutes until salmon is cooked through and broccoli is roasted. The inside of the thickest part should be at 140° - 145° degrees. Careful not to overcook!
Squeeze lemon juice over the top of each salmon piece and garnish the top with cilantro, green onion and sesame seeds.