Heat up a wok and add in the water, red curry paste, galanga and rhizome (optional). Stir to combine until boiling.
Add the pork and let it cook for 1 minute. Add the fish sauce and sugar. Stir to mix. Gently transfer the bamboo shoot, baby corn, straw mushroom, string beans and kaffir leaves into the wok. Stir to mix.
Cover the wok and bring to boil. Turn the heat to medium and let it cook for 5-6 minutes. Add in the basil leaves. Give it a quick stir and cook for 2 minutes. Serve with rice.