How to devein shrimp with shells and heads. Firstly use a kitchen shear to trim off the legs and the sharp part at the top of the head to avoid hurt.opening the carapace of the head. Then wash carefully under running water. Washing is extremely important for Chinese poached shrimp, as the head parts spoil the flavor.
In a large pot of water, add scallion, ginger, salt and Sichuan peppercorn (my personal favorite but optional). Bring the water to a boiling.Transfer out as soon as possible.
Mix all the ingredients for dipping sauce together. Serve with dipping sauce.