Heat the vegetable oil in a large skillet over medium-high heat.
Add the salmon fillets skin-side down (if using skin-on) and cook for 4-5 minutes, until browned.
Flip and cook for another 2-3 minutes, then remove the salmon from the pan and set aside.
In the same skillet, combine the soy sauce, honey, rice vinegar, sesame oil, garlic, and ginger. Bring to a simmer.
Stir in the cornstarch slurry and cook for 1-2 minutes until the sauce thickens and turns glossy.
Return the salmon to the pan and spoon the sauce over each fillet. Cook for another minute to heat through.
Garnish with green onions and sesame seeds.