The preparation of ajvar is somewhat difficult, as it involves a great amount of manual labour, especially related to peeling the roasted peppers. Traditionally, it is prepared in mid-autumn, when bell peppers are most abundant, conserved in glass jars, and consumed throughout the year (although in most households stocks do not last until the spring, when fresh salads start to emerge anyway, so it is usually enjoyed as a winter food). Often, the whole family or neighbours gather to bake the bell peppers, peel them, and cook them. The principal cultivar of pepper used is called roga, i.e. horned — it is large, red, horn-shaped, with thick flesh and relatively easy to peel.