01 - Combine rice vinegar, sugar, and salt in a bowl. Add carrots, cucumber, and radishes. Toss well and let sit for at least 20 minutes, stirring occasionally to evenly distribute flavors.
02 - Rinse jasmine rice until water runs clear. Combine rice, water, and salt in a saucepan. Bring to a boil, cover, reduce heat to low, and simmer for 15 minutes. Remove from heat and let stand, covered, for 5 minutes. Fluff with a fork before serving.
03 - Whisk together soy sauce, mirin, honey or maple syrup, rice vinegar, sesame oil, ginger, and garlic in a small bowl until fully incorporated.
04 - Place salmon fillets in a shallow dish or resealable bag. Pour half of the marinade over the fish, turning to coat evenly. Marinate for 10 to 30 minutes in the refrigerator. Reserve the remaining marinade for the sauce.
05 - Preheat oven to 400°F or heat a nonstick skillet over medium heat. Remove salmon from marinade and place on a foil-lined baking sheet or in the skillet. Bake for 10 to 12 minutes or cook in skillet until salmon is just cooked through and flakes easily with a fork.
06 - Pour the reserved marinade into a small saucepan. Bring to a simmer over medium heat. If desired, mix cornstarch with 1 tablespoon water and stir in to thicken. Cook for 2 to 3 minutes until sauce becomes glossy and coats the back of a spoon.
07 - Combine mayonnaise, sriracha, and lime juice in a small bowl. Mix until smooth and fully incorporated. Adjust sriracha amount to achieve desired spice level.
08 - Divide rice among four bowls. Arrange salmon, drained pickled vegetables, avocado slices, scallions, sesame seeds, cilantro, and nori strips on top. Drizzle generously with teriyaki glaze and sriracha mayo. Serve immediately.