Preheat the oven to 250ºF. Line a rimmed baking sheet with foil or parchment paper and grease with the avocado oil.
Season salmon with salt and pepper, to taste then place onto the prepared baking sheet. Rub in the coconut aminos and garlic, if using.
Bake at 250ºF for 20-35 minutes, or until the fish is just beginning to flake, or registers 120ºF inside. It will have a more raw appearance but be cooked at this point.