Step 1

Place pork belly, skin side down, in a large pot and add enough water to completely submerge meat. Add garlic, bay leaves, peppercorns, and soy sauce. Bring to a boil over medium-high heat, then lower heat and reduce to a simmer. Cover and cook until pork skin can be pierced with a knife with no resistance, about 1 hour. Transfer pork to a wire rack set in a rimmed baking sheet and season liberally with salt all over. Refrigerate pork until skin has completely dried, 6 hours or overnight.

Step 2

Remove pork from refrigerator and cut into 3/4-inch slices.

Step 3

Fill a wok or Dutch oven at least 4 inches oil and heat to 375°F over high heat. Working in batches, fry pork until deeply browned and skin has bubbled and crisped, 7 to 10 minutes. Transfer pork to a paper towel-lined plate and season with salt to taste. Cut pork slices into 1/2-inch pieces. Serve immediately with vinegar for dipping.