Soak the rice vermicelli in warm water for 10–15 minutes until softened, then drain.
Heat cooking oil in a large wok or skillet over medium heat.
Sauté the minced garlic until fragrant, then add the sliced chicken and cook until lightly browned.
Add the mixed vegetables and stir-fry for 3–4 minutes until slightly tender.
Pour in the chicken broth and soy sauce, then bring to a gentle simmer.
Add the softened bihon noodles and gently toss until they absorb the broth and are evenly coated with the sauce.
Continue cooking for 3–5 minutes, stirring occasionally, until the noodles are fully cooked. Serve hot with calamansi or lemon wedges if desired.