Heat the coconut oil in a large pan over medium-high heat. Salt the pork well. Add the pork to the pan and cook until it is golden brown, about 8 minutes, stirring regularly.
Turn the heat up to high, and add the peppers, pineapple, and onion to the pan. Cook for 6-8 minutes, until the onions start to get translucent and the peppers begin to soften.
Add the sauce to the pan and continue cooking until the sauce has thickened.
Remove the pan from the heat and serve the pineapple pork over rice or noodles. Top with scallions and sesame seeds.