POUR boiling water over vermicelli and allow to stand for 5 minutes until softened. Drain and snip into approx. 4cm lengths.
HEAT oil in a frying pan over medium heat. Add chicken and sear until golden. Add spring onions and cook a further 2-3 minutes. Stir through the peanut butter, lime juice, fish sauce and sweet chilli. Cook a further 2-3 minutes.
ADD the vermicelli to the chicken mix and spoon into prepared lettuce cups, drizzle with extra sweet chilli and serve immediately.