There are a couple ways to prevent the dreaded soggy Egg Salad Sandwich. First, be sure to toast the bread before assembling the sandwich. This will help to keep the bread from getting too moist and falling apart. You can also add a layer of lettuce or tomato to the sandwich to help absorb some of the moisture from the egg salad. Finally, consider using sandwich bread or rolls with a firmer crust, as these types of bread are less likely to become soggy when filled with a moist filling like egg salad.