A sweet, sour, salty, savory, and spicy dipping sauce, nuoc cham is the perfect partner for crispy spring rolls filled with a rich blend of ground pork, shiitake mushrooms, cabbage, and carrots. Experiment with the filling ingredients to suit your taste, but be sure to remove any excess moisture with paper towels so the wrappers won’t get soggy. Purchase frozen spring roll wrappers made with wheat, not the rice wrappers used for summer rolls and fresh spring rolls.