A once-common feature at english teas was a ramekin of seasoned shrimp or mushrooms-referred to as either potted shrimp or mushrooms. The main ingredient is cooked in butter, seasoned and then packed in butter (this is similar to the french confit). In addition to the rich flavor the butter brings, it also acts as a preservative so that potted shrimp can last as long as 4 weeks in the refrigerator. Potted shrimp makes a great canap for a party, but also a great snack just waiting in the fridge.