Mustard greens are an excellent source of many vitamins including vitamin K, vitamin A (in the form of beta-carotene), vitamin C and vitamin E. They are also an excellent source of the minerals copper, manganese, and calcium.
Bullet chillies are from the family of Chinese 'facing heaven' chillies that includes chaotian. They have a citrussy heat that works brilliantly with Sichuan pepper.
Momordica charantia (colloquial: bitter melon; bitter apple; bitter gourd; bitter squash; balsam-pear) is a tropical and subtropical vine of the family Cucurbitaceae, widely grown in Asia, Africa, and the Caribbean for its edible fruit. Its many varieties differ substantially in the shape and bitterness of the fruit.