Start this recipe a day ahead to marinate the pork.
For the nuoc cham, see Thi Le's beef tartare recipe.
Dried banh hoi noodles are available from Asian grocers in flat rectangular pieces. If they're unavailable, substitute rice vermicelli. Herbs are available from Vietnamese grocers and select Thai grocers. Kampot peppercorns, from Cambodia, are available from Herbie's Spices (herbies.com.au). You can use a char-grill pan to cook the pork, although it will need to be cut in half to cook evenly and prevent burning; the final cooking time may vary.
Drink Suggestion: Express Winemakers Rosé 2015, Margaret River – a grenache rosé with abundant red-berry characters that give way to more savoury, orange-peel and herbal notes. Add to that racy acidity an almost salty finish and fresh crunch. Drink suggestion by Andrew Barry