In spite of the obvious influence of
stuffing shells and baking them, the Vietnamese have artfully made this
dish their own with a combination of bean thread noodles and cloud ear
mushrooms. It is time-consuming to cook the crabs yourself, so use freshly
cooked crab meat from your fishmonger or supermarket. You will also need
four small, empty crab shells. If you haven't eaten crab recently and kept
the shells, you could ask your local fishmonger or look for some in the
Asian markets. Alternatively, use individual ovenproof dishes. Bean thread
noodles and cloud ear mushrooms are available in Chinese and Asian
markets.