Step 1In a small bowl, whisk together the chile oil, light soy sauce, black vinegar, peppercorns and garlic. This makes about one-half cup dipping sauce.
Step 1Clean the pig ears: Remove any dirt or hairs, and rinse the ears thoroughly. Set aside.
Step 2In the pressure cooker, combine the chicken broth, rice wine, light soy sauce, salt and sugar.
Step 3Make a sachet: In a large piece of cheesecloth, place the star anise, ginger, garlic and onion. Bring the sides of the cheesecloth together to make a pouch and tie together with cotton twine.
Step 4Place the sachet in the pressure cooker with the liquid, and place the pig ears on top. Seal the cooker and bring the pressure to 15 PSI. Cook the ears for 1 hour, then turn off the heat and let the pressure cooker depressurize naturally.
Step 5Once the pressure has dissipated, remove the pig ears and set aside. Strain the liquid into a heavy-bottomed saucepan, discarding the sachet. Place the pan over high heat and add the black vinegar. Cook the liquid until it is thickened and reduced to about 2 cups (tiny bubbles will cover the surface of the liquid). Remove from heat.
Step 6While the liquid is reducing, cut the pig ears into large enough pieces that they fit the width of the terrine mold.
Step 7Prepare the terrine mold: Rub a small amount of water along the inside of the terrine mold. Place a large piece of plastic wrap in the mold, sliding it along the inside so it smoothly lines the terrine mold, extending out of the mold at least 2 inches on all sides.
Step 8Assemble the terrine: Place pieces of pig ear in an even, solid layer in the bottom of the prepared mold, then pour a small amount of the reduced liquid over the ears so the liquid just comes to the top of the ear layer. Build another layer of pig ear on top of the first, adding more of the reduced liquid just to cover. Repeat with the layers of pig ear and liquid until the terrine reaches just below the top of the mold.
Step 9Tap the mold against the table to release any air bubbles, and carefully pull the plastic from each side to prevent creasing of the plastic wrap. Gather the extra plastic wrap at the top and fold it over the terrine, as if you were wrapping a present.
Step 10Cut a piece of cardboard just large enough to fit the terrine. Place it on the plastic-covered top of the terrine, making sure it sits just inside the walls of the mold. Place the mold in the refrigerator, with a weight on top of the cardboard. Refrigerate overnight to set the terrine.
Step 11The next day, unmold the terrine. Unwrap the plastic wrap and slice to desired thickness. Serve with julienned carrots, scallions and ginger threads, along with the dipping sauce.