In a medium bowl, toss radishes and carrot with vinegar, sugar and salt, and let sit while preparing remaining ingredients.
Step 2
Cook rice noodles according to package instructions. Immediately transfer to a colander and rinse under cold water to cool. Set aside to drain.
Step 3
In a small bowl, prepare the dressing: Stir together lime juice, oil, fish sauce, ginger, garlic and chiles.
Step 4
Pile noodles in a large bowl, then top with radish and carrot mixture and any juices from the bowl, cucumber, lettuce, scallions, herbs, peanuts and eggs, if using. Drizzle the dressing over the top.