Pound together garlic, white peppercorns, and cilantro roots in a mortar and pestle until a paste is achieved.
In a bowl, mix together ground pork and soy sauce until well combined, mashing the pork to get rid of the “pork tubes.”
In a wok or a saute pan, heat a little vegetable oil over medium heat. Add the garlic mixture and stir until aromatic and the garlic starts to turn golden. Add onion and tomato and cook until the onion is translucent and the tomato begins to mush, about 1-2 minutes.