In a small bowl, whisk together the orange juice, soy sauce, ginger, and garlic
Warm 1/2 of the oil in a large skillet over medium-high heat and place the fish, skin-side up, in the skillet and cook for about 3-4 minutes without flipping, until a slight crust forms
Flip the salmon and cover with the orange-ginger sauce, using a spoon or baster to cover the fish occasionally
Cook for about 3-5 minutes, until the sauce starts to thicken
Remove the fish from the pan and place on a rimmed baking sheet and roast for about 3-5 minutes, until cooked to an internal temperature of 125F
Meanwhile, pour the remaining sauce into a bowl to reserve and add the snow peas to the pan with the remaining sesame oil and cook for about 4-5 minutes, stirring occasionally, until they soften and start to char
Sprinkle the snow peas with sesame seeds, salt, and reserved orange-ginger sauce
Serve the salmon with the snow peas and garnish with sliced green onion