Soak vermicelli in boiling water until tender (3-5 minutes), then drain, refresh under cold running water, and drain well. Snip with scissors into 10cm-15cm lengths and transfer to serving bowls.
Step 2
For dressing, whisk fish sauce, lime juice, garlic and chilli in a bowl and season to taste with sugar.
Step 3
Top noodles with cabbage, cucumber, shallots, spring onion, peanuts, herbs and bean sprouts, drizzle with dressing and serve with lime cheeks.