Using a mortar and pestle or food processor, smash together shallots, ginger, cilantro stems, and garlic into a paste. Add chilis and smash until bruised and incorporated. Add pork and mix heavily. Add tomatoes along with the rest of ingredients and continue to work mixture until blended and the tomatoes have burst.
In a medium-sized skillet, heat, stirring, until pork is cooked through and some of the liquid has evaporated, making a thick, saucy mixture. Garnish with Cilantro.
Serve with an assortment of vegetables, fresh or steamed, pork rinds, and sticky rice if desired.
Find it online: https://frugalhausfrau.com/2016/01/07/nam-prik-ong-2/