Heart of glass: Light and delicate vermicelli noodles
Cellophane noodles will be as flavoursome as the ingredients they are cooked with

Glass vermicelli, which goes by many names, including fen si, bean thread vermicelli and cellophane noodles, is made from mung bean starch. It's very delicate and if you overcook it, it will fall apart. It has a slippery texture and absorbs the flavours of whatever ingredients it's cooked with.
For the yellow beans, I use the Kowloon Soy brand of soya bean, which comes in a jar as a thin brown paste. Fresh green peppercorns are sold at shops specialising in Thai produce, which should also stock the holy basil.
I prefer to cook shrimp whole because they have more flavour, but if you want to use just the meat, remove the heads and shells and add them to the small shrimp when making the stock.
You can substitute other ingredients for the shrimp: fresh clams, for example; or make an all-meat version by increasing the amount of pork (and use home-made pork or chicken stock, instead of shrimp stock); or even make a vegetarian clay pot by omitting the fish sauce and cooking the glass vermicelli and seasonings with fried bean curd, Chinese cabbage and a vegetable broth.
