Sprinkle the salmon with salt and pepper on each side, then heat a large skillet over medium-high heat and coat with coconut oil.
Cook the salmon about 4 minutes on each side, until there is a golden-brown, crispy skin on the outside and the inside has cooked through.
Meanwhile, in a small saucepan over high heat, bring the vinegar, aminos, honey, ginger, and wasabi to a boil, then reduce the heat to medium-high and stir until the sauce thickens, about 5 minutes. Set aside.
Serve the salmon topped with the sauce and green onions for garnish.