From the archive record
Brassica rapa, commonly known as turnip, turnip rape, fast plants, field mustard, or turnip mustard is a plant widely cultivated as a leaf vegetable, a root vegetable, and an oilseed. In Punjabi its called SARSUN. In Punjab they make Curry with this plant. It is a popular curry in the Punjab region of India and Pakistan made from mustard leaves (sarson) and spices. It is regarded as the traditional way of making saag and is traditionally served with makki di roti, which literally means (unraised) corn bread. It can be topped with either butter or more traditionally with ghee (clarified butter). Some spinach (called palak in Punjabi) can be added for added colour and thickening the dish, even if this could alter the taste Sources- https://www.google.co.in/?gfe_rd=cr&ei=rXprV5Iy0-a4BL_ehYAC