Sprinkle a generous amount of salt on the catfish filets. Gently rub the salt into the filets then rinse the salt off using warm water. Pat the filets dry with paper towels and set it aside.
Gather the fish sauce, chili garlic sauce, chopped garlic, sugar, vegetable oil, salt, pepper and hoisin (or Vietnamese caramelized sauce) and mix them together in a bowl. Give the marinade a taste and adjust accordingly if needed.
Place the catfish filets in the marinade and let them marinade for 20 minutes.
After the 20 minutes, place the filets in a hot pan on medium heat. Let each side cook for 4 minutes then add in the coconut soda or coconut water.
Let the coconut soda/water come to a boil and the liquid will reduce.
Serve the caramelized filets with chopped green onions, a side of Jasmine rice and sprinkle with red hot chili flakes.