Prepare the base by tossing the warm cooked white rice with rice vinegar in a small bowl.
Season the salmon fillet with the sea salt and heat avocado oil in a non-stick skillet over medium-high heat.
Place the salmon in the pan and sear for 4-5 minutes per side until the exterior is golden and the center is just cooked through.
While the salmon cooks, thinly slice the cucumber, radishes, and green onion, and cut the nori sheet into small strips.
In a small ramekin, whisk together the tamari and freshly grated ginger to create a simple dressing.
Flake the cooked salmon into large chunks or leave it whole, then place it on top of the rice.
Arrange the cucumber, radishes, and nori strips around the salmon, then drizzle with the tamari-ginger glaze.
Garnish with sliced green onions and sesame seeds before serving.