Soak the Noodles: Soak the bean thread noodles in room temperature water while you prepare the other ingredients. This should take roughly10-30 minutes.
Make Spice Paste: Peel the garlic and ginger. Slice the ginger into thin matchsticks. Wash the cilantro root, peel off any tiny rootlets, and cut into ½ inch pieces. Place these aromatics in a mortar and pestle along with the whole black peppercorns. Pound together until a coarse paste forms. **Save 10-20 matchstick slices of ginger for layering separately**
Make Sauce Mix: Combine the oyster sauce, thin soy sauce, dark soy sauce, sesame oil, and water in a bowl. Stir together until all sauces are well combined.
Assemble Clay Pot: Start by covering the bottom with several bite-sized pieces of bacon. Then add a thin layer of the spice mixture with a few matchstick slices of ginger on top. Drain the bean thread noodles, then add them to the clay pot. Next add the shrimp. Then pour the seasoning sauce on top of everything. You can add the Chinese celery at this point, or wait until approximately 5 minutes of cook time are left to add it so that it retains a bit of crunchiness.
Cook Clay Pot: Place the assembled clay pot on a stove top (with a heat diffuser between it and the burner, if using). Turn on the heat to medium high and cook, covered, for 20 minutes.
Serve: Once the clay pot is done, mix all of the ingredients together on a plate. Serve immediately, with Nam Jim Seafood, if you like.
Notes
The recipe amounts listed above fit into two standard-sized clay pots. If you are using a clay pot, prepare everything in their full amounts, but use only half per clay pot. You will have enough to cook two clay pots.