01 - Rinse rice under cold running water until the water runs clear. Combine rice, water, and a pinch of salt in a small saucepan. Bring to a boil, cover, reduce heat to low, and simmer for 12 to 15 minutes until all water is absorbed. Remove from heat, fluff with a fork, and keep warm.
02 - Pat salmon fillets dry with paper towels. In a small mixing bowl, blend soy sauce, sesame oil, salt, and black pepper. Brush marinade evenly over salmon fillets. Lightly dust the skin side of each fillet with cornstarch.
03 - Heat a nonstick skillet over medium-high heat. Arrange salmon fillets skin side down in the skillet and cook for 4 to 5 minutes, pressing gently to ensure even crisping. Flip fillets and cook for an additional 2 to 3 minutes until flesh turns opaque and reaches desired doneness. Transfer salmon to a plate and set aside.
04 - Slice cucumber thinly, julienne carrot, slice avocado, steam edamame, and finely slice scallions. Cut nori into thin strips if using.
05 - In a small bowl, whisk together soy sauce, rice vinegar, honey or maple syrup, sriracha if using, and grated ginger until well combined.
06 - Divide cooked rice among four serving bowls. Arrange cucumber, carrot, avocado, edamame, and scallions over the rice. Place one salmon fillet on each bowl. Drizzle with prepared sauce and sprinkle with sesame seeds and nori strips if desired.