Preheat the oven to 450 degrees
Zest and juice the lemon and orange and combine with the ginger, garlic, gochujang, soy sauce, oil, honey, and salt in a jar
Blend with an immersion blender until smooth
Cut the broccoli into bite-size florets, slice the red onion and combine in a mixing bowl. Pour half of the dressing into the bowl with the broccoli and onions, and toss to coat.
Transfer the broccoli and onions onto a parchment-lined baking sheet—leaving the excess dressing in the bottom of the mixing bowl—and roast in the oven for 5-10 minutes depending on how cooked you like your broccoli.
Toss the salmon in the mixing bowl with whatever dressing is still in the bowl from the broccoli tossing. Add a splash more dressing if needed, reserving a little bit to drizzle over the salmon and broccoli when it comes out of the oven.
After 5-10 minutes in the oven, remove the baking sheet and push the broccoli and onions to one side. Place the salmon on the tray, ensuring that nothing is piled on top of each other, and return everything to the oven to bake for another 10 minutes.
Remove from the oven and drizzle the remaining dressing over the salmon and broccoli.
Plate everything up, garnish with fresh chopped cilantro and enjoy!