Persicaria odorata, with common names Vietnamese coriander, rau răm, laksa leaf, Vietnamese cilantro, phak phai, praew leaf, hot mint, Cambodian mint and Vietnamese mint, is an herb whose leaves are used in Southeast Asian and Northeast Indian cooking.

Laksa is a spicy noodle dish popular in Southeast Asia. Laksa consists of various types of noodles, most commonly thick rice noodles, with toppings such as chicken, prawns or fish. Most variations of laksa are prepared with a rich and spicy coconut curry soup or a broth seasoned with asam.