I miss this dish so I put together my own recipe.
Swapping mung bean threads for standard rice noodles fundamentally alters the dish because mung bean starch gelatinizes differently than rice flour. Mung bean noodles absorb liquid without releasing excessive surface starches, maintaining a translucent appearance and distinct bite rather than releasing cloudiness into the broth. When building the aromatics, sweat the sliced ginger and garlic in neutral oil over medium-low heat for roughly three minutes until aromatic, preventing the compounds from turning bitter before the stock is added.
Long rice requires careful monitoring during the simmer phase to achieve the desired consistency. The noodles continue hydrating as the temperature holds, absorbing liquid at a rate of roughly double their dry weight. Break the dry strands into lengths of four to six inches before cooking to ensure even distribution throughout the pot and prevent clumping during service. Maintaining a gentle simmer rather than a rolling boil prevents the chicken thighs from tightening prematurely while allowing collagen to break down fully over forty-five minutes.