Sauté: Heat oil in a pan over medium heat. Add garlic, onion, and chilies. Sauté until fragrant and the onion softens.
Cook Pork or Shrimp: Add the pork (or shrimp) and cook until browned.
Add Coconut Milk and Shrimp Paste: Stir in the shrimp paste and coconut milk. Simmer for about 20 minutes or until the pork is tender and the sauce has thickened.
Season: Add fish sauce, salt, and pepper to taste.
Serve: Serve hot with rice for a rich and flavorful dish.