1.Soak noodles in boiling water, in a large heatproof bowl, 5 minutes; stir to separate strands, then drain. Squeeze out excess water. Using scissors, snip noodles into shorter lengths; transfer to a large bowl.
2.Add onion, carrot, sprouts, coriander, beans, corn and peanuts to noodles; toss to combine. Season with salt.
3.Whisk juice, sauces and oil in a small jug; drizzle over noodle mixture. Toss to combine.
4.Spoon noodle mixture into lettuce cups. Serve with lemon wedges.
Snipping noodles makes them easier to mix through the other ingredients.