Prepare the picked carrot and daikon one day ahead.
Prepare the sauce, by combining all ingredients, the day before if possible. Add more fish sauce, or sugar, to your taste.
To prepare the marinade, combine the shallots, garlic, crushed red pepper, lemongrass, sugar, fish sauce, thick soy, pepper, and oil. Mix very well.
Cut the pork into bite-sized pieces, or smaller, and mix with the marinade. Let sit at least 2 hours, and preferably overnight.
When you're ready to cook, preheat the oven to 375F. Line a baking sheet with foil and spread the marinaded pork evenly. Bake for 10 minutes (this will vary depending on how thick you slice your pork!) or until just underdone. Turn the oven to broil, move the pan up to the highest rack, and broil for 2-3 minutes (until there are significant black/charred parts on the pork). Remove from the oven.
While the pork is cooking, boil water. Lay the rice noodles in a shallow dish and pour the boiling water over the noodles. Cook for 10-12 minutes, checking for doneness. Drain and rinse with cold water.
To assemble, layer the cold noodles, meat, herbs (be generous!), cucumber, pickled carrot and daikon, and about 3 Tbsp of sauce per bowl.
Recipe by The Kitchen Paper at http://c02.ddd.mwp.accessdomain.com/vietnamese-sticky-pork-noodles-bun-thit-nuong/