In a small bowl, stir to combine the sesame oil, ginger, garlic, coconut aminos, and chili paste.
Using a brush, spread the marinade onto the fish.
Marinate in the refrigerator for 20 minutes.
Remove the fish from the marinade (discard the marinade, although you can spoon a couple of tablespoons over the fish while it’s cooking, if you like).
In a large skillet over medium-high heat, cook the fish for about 5 minutes on each side, or until it turns white and begins to get flaky.
Season with pepper.
Garnish with scallions and serve hot.