Heat enough oil in a wok until hot and deep-fry vermicelli (fry a bundle at a time) until golden. (Vermicelli will turn golden in seconds.)
Remove and drain on absorbent paper towels. Plunge deep-fried vermicelli into a basin of boiling water. Dish out and drain well in a colander. (This is to remove the oil from the vermicelli.)
Heat oil and sesame oil in a wok. Fry garlic until lightly browned. Add prawns and all the vegetables. Stir-fry well. Stir in vermicelli and add combined seasoning. Fry well to combine. Dish out and serve immediately.