Melt some cooking fat in a large skillet placed over high heat.
Cooking fat
Stir-fry the pork for about 5 minutes, remove from the heat, and set aside.
1.5 lbs. pork tenderloin
Add the garlic, ginger, and onion to the skillet and cook until fragrant (about 2 minutes).
1 onion, 1 thumb-size knob of ginger, 2 garlic cloves, Sea salt and freshly ground black pepper
Add the bell pepper and pineapple to the skillet and cook until it starts to soften but is still crunchy.
1 big bell pepper, 20 oz. pineapple
Pour in the coconut aminos and the pineapple juice.
¼ cup coconut aminos, ¼ cup fresh pineapple juice
Return the pork to the skillet and stir until everything is well coated and heated through.
If needed, stir in some tapioca starch to thicken the sauce.
1 tbsp. tapioca starch