In a small measuring cup, combine soy sauce, onion, sesame oil, ginger, brown sugar, garlic, and sesame seeds. Whisk until thoroughly combined. You should see a glossy mixture that smells amazing.
Set aside 2 tablespoons of this marinade, then place the salmon in a shallow bowl or Tupperware container. Pour the remaining marinade over the salmon, ensuring it’s well coated. This step is crucial for infusing flavor into the fish.
Cover and refrigerate to allow the fish to marinate for at least 2 hours or, for the best flavor, up to overnight. If you’re in a hurry, don’t fret! You can let it marinate for just 20 minutes.
In a medium bowl, add mayonnaise, gochujang, and 1 tablespoon of water. Whisk to combine until smooth. This creamy sauce will bring everything together!
Next, add the coleslaw and scallions to the bowl, tossing to ensure everything is coated in the dressing. You should have a vibrant, crunchy slaw ready to go!
Now, heat a clean outdoor grill (make sure the grates are clean and lightly oiled) or an oiled grill pan over medium-high heat.
Once hot, carefully place the salmon pieces, flesh side down, on the grill. Cook for about 3 to 5 minutes. Keep an eye on them; thinner fillets will cook faster than thicker ones, and you’re looking for a nice char.
Using a spatula, carefully flip the salmon. Top each piece with a tablespoon of the reserved marinade. Cook for an additional 2 to 4 minutes, or until the fish flakes easily with a fork. It should look nicely charred.
Set the cooked salmon aside on a clean cutting board or plate. Allow it to rest for a moment while you prepare the tortillas.
Heat the corn tortillas over an open flame, on the grill, or in the microwave until warm and pliable.
On each plate, place 2 warm tortillas. Using a spatula, break the salmon into pieces, gently sliding the spatula between the flesh and skin to remove the skin.
Place a piece or two of the salmon on each tortilla and top each with about 1/3 cup of the slaw. Repeat until all the fish and slaw are used up.
Serve immediately and enjoy the flavors of your Korean Inspired Salmon Tacos!
