In a small bowl, whisk together the soy sauce, rice vinegar, maple syrup, garlic, ginger, sesame oil, and black pepper until fully combined.
Sear the Salmon
Heat a large, heavy-bottomed skillet over medium-high heat. Once hot, add the vegetable oil. Arrange the salmon pieces in a single layer and sear undisturbed for approximately 2 minutes. Flip each piece gently and cook for another 1-2 minutes on the opposite side.
Add the Sauce
Pour the prepared sauce over the salmon, ensuring it evenly surrounds each piece. Cover the skillet with a lid (or foil if a lid is unavailable) and let it cook for an additional 4-5 minutes. Stir and turn the salmon occasionally until fully cooked and easily flaked with a fork.
Adjust Seasoning
Taste the salmon and sauce. If needed, add a small amount of kosher or sea salt to enhance the flavor.
Serve
Transfer the salmon bites to a serving dish, garnished with sesame seeds and sliced green onions. Pair with white rice or your preferred side dish, and enjoy warm.