In a mixing bowl, combine the low-sodium soy sauce, rice vinegar, minced garlic, grated ginger, honey, and garlic-chili paste (or red pepper flakes). Whisk until well blended.
Place the salmon fillets in the bowl with the marinade, ensuring that each piece is well coated. Let them sit for at least 15 minutes at room temperature.
In a skillet, heat the canola oil over medium-high heat. Make sure the oil is hot but not smoking before adding the salmon.
Carefully add the salmon fillets to the skillet, skin-side down. Cook for about 4-5 minutes without moving them, allowing the skin to crisp up.
Gently flip the salmon using a spatula and cook for an additional 3-4 minutes, or until the salmon is cooked through and flakes easily with a fork.
Remove the salmon from the skillet and let it rest for a minute. Serve garnished with chopped green onions and toasted sesame seeds.