Gently fold together avocado and next 7 ingredients; reserve. Brush edges of 1 egg roll wrapper with egg. Put a scant 1/3 cup filling 1 inch down the edge of the wrapper. Fold in sides; brush sides with egg. Roll. Seal tightly. Refrigerate on a parchment-lined sheet pan dusted with cornstarch, covered, for at least 45 minutes. Rolls can be made up to 8 hours ahead of service. PER ORDER Shallow fry 1 roll in hot olive oil, turning frequently, until golden brown, about 3 minutes. Serve with 3 tablespoons dipping sauce; garnish with lime slices and cilantro sprigs. Dipping Sauce