How to Make It
Preheat the oven to 400°. In a small saucepan, bring the mirin and sake to a boil. Whisk in the ají amarillo paste, miso and orange and lime juices and simmer gently, stirring occasionally, until thickened, about 20 minutes.
Meanwhile, season the salmon with salt and pepper. Press 2 tablespoons of the quinoa onto the skinned side of each fillet.
In a large ovenproof nonstick skillet, heat the canola oil. Add the salmon fillets, quinoa side down, and cook over high heat until the quinoa is browned, about 2 minutes. Transfer the skillet to the oven and roast the salmon until almost opaque throughout, about 4 minutes.
Using a spatula, carefully transfer the fillets to plates, quinoa side up. Spoon the diced cucumber alongside and serve with the orange-miso sauce.
Ají amarillo paste is a spicy Peruvian yellow chile paste. It’s available in many supermarkets and online at amazon.com.