Wok-tossed noodles seared over ferocious heat with spring onions, beansprouts, aromatic garlic, and savoury seasoned sauce.
Soak the vermicelli in warm water for 15 minutes, then drain well.
Press the noodles into small flat nests on a heatproof plate and steam for 10 minutes until tender.
Brush each nest with the spring onion oil and season lightly with the fish sauce.
Scatter with the spring onions, fried shallots, and sesame seeds.
Arrange on the lettuce with lime wedges and serve warm.