The chilli peppers

Wikipedia: The chilli pepper (also chile pepper or chilli pepper, from Nahuatl chīlli /ˈt͡ʃiːli/) is the fruit^[1] of plants from the genus Capsicum, members of the nightshade family, Solanaceae. In Britain, Australia, New Zealand, South Africa, India,^[2] and other Asian countries, the word “pepper” is usually omitted.

The substances that give chili peppers their intensity when ingested or applied topically are capsaicin (8-methyl-N-vanillyl-6-nonenamide) and several related chemicals, collectively called capsaicinoids.

Chili peppers originated in the Americas.^[3] After the Columbian Exchange, many cultivars of chili pepper spread across the world, used in both food and medicine. Chilies were brought to Asia by Portuguese navigators during the 16th century.

Chillies used a lot in Indonesian cooking. Use sparingly, it takes time to get use to this hot ingredients. 

Lemon Grass

Wikidpedia: Cymbopogon, commonly known as lemongrass (UK: /ˈlɛmənˌɡrɑːs/; US: /ˈlɛmənˌɡræs/) is a genus of about 45 species of grasses, (of which the type species is Cymbopogon citratus, a natural and soft tea anxiolytic^{[citation needed]}) native to warm temperate and tropical regions of the Old World and Oceania. It is a tall perennial grass. Common names include lemon grass, lemongrass, barbed wire grass, silky heads, citronella grass, cha de Dartigalongue, fever grass, tanglad, hierba Luisa, or gavati chaha, amongst many others.

Galangal (Alpinia galanga variety)

Wikipedia: Alpinia galanga, (also Languas galanga),^[1] a plant in the ginger family, is an herb used in cooking, especially in Indonesian and Thai cuisines. It is one of four plants known as galangal, and is differentiated from the others with the common name greater galangal (or simply Thai galangal). The galangals are also called blue ginger or Thai ginger.

A. galanga is called laos in Indonesian and is the most common form of galangal used in cooking. It is also known as lengkuas and galanga root. In Manipuri, it is known as kanghu. in Myanmar, it is called pa de kaw.