Cut the pork neck into small cubes about two centimeters long, season with salt, pepper and fry on all sides in olive oil. The meat should be almost cooked through. Then keep the meat warm.
Grind the peppercorns, garlic, fish sauce and olive oil in a mortar to a paste. Of course, you can also use the hand blender, but it doesn`t work well with the small amount.
Heat the sunflower oil, add the palm sugar and melt. It shouldn`t turn brown in the process. Add the shallot cubes and the seasoning paste and season with the fish sauce again. Let the mixture simmer for a few minutes. The sauce should have a viscous consistency.
Add the pork cubes and cover all over with the sauce.