A mousse is a food assembled from precooked ingredients and that receives no further cooking after it is assembled. In addition, a mousse receives a lot of handling and has a lot of surface area exposed to contamination. Many mousses have a highly perishable protein food as their main ingredient, and all contain protein in the form of cream and, sometimes, raw egg whites. Due to these factors, be especially vigilant about food safety when preparing mousses. Before preparing a seafood mousse, review the food safety guidelines below.