https://www.recipetineats.com/vietnamese-chicken-pho-soup-pho-ga/

Char onion & ginger - Place ginger and onion facedown on a sheetpan and broil

BROTH:
** for veg broth, use mushrooms and veg bouillon in place of chicken **

Put ingredients from oil to sugar in pot - Add water and remaining Broth ingredients EXCEPT salt. Bring it a simmer, then lower heat so it's simmering VERY gently with the lid on, but open a crack (Note 6).

Simmer gently 1.5 hours. Scoop off scum (dirty foam) that rises to surface once or twice during the simmering.

Strain & measure - Remove chicken, then strain broth into a clean pot - you should have 1.5 litres / 1.5 quarts. If you have more, simmer to reduce. If less, top it up with water.

Salt broth - Add salt, bring broth to a gentle simmer. Broth should be slightly on the salty side - it dilutes when you add the noodles.

Keep broth warm until ready to serve

Shred chicken meat, discard bones and skin. (Note 6 Leftover Chicken ideas)

ASSEMBLING:
Place Toppings out on the table.
Reheat chicken (can briefly dunk in broth!).
Prepare noodles per packet directions, just prior to serving. Drain very well (excess water dilutes broth).
Place noodle in bowls. Top with chicken, ladle over 375ml / 1.5 cups broth. Sprinkle with green onion.
Pile on Toppings of choice, add a squeeze of lime into the broth. Consume immediately!