Mustard is a vegetable group of plants from the clan of Brassica which is used for its leaves or flowers only as food for vegetables, whether fresh or processed. Mustard includes several species of Brassica that are sometimes similar to each other.
In Indonesia commonly referred to as mustard usually refers to the green mustard greens, Brassica rapa parachinensis group, also called mustard meatballs, caisim, or caisin. In addition, there are also chicory Brassica rapa pekinensis group, also called petsai, which is usually made soup or processed into pickles. The other species sometimes referred to as the green mustard greens are vegetable mustard and to distinguish them from caisim. Kailan Brassica oleracea alboglabra group, is a rather different kind of leaf vegetables, because the leaves are thicker and more suitable to be a mixture of fried noodles. Mustard scoop pakcoy or bok choy, a kind of leaf kin vegetables that began to be known also known in the world of culinary in Indonesia.
