Belgian endive

Belgian endive is grown in a two-part process. The first part requires sowing the crop and allowing it to mature in the ground for up to 140 days. After this, the green leafy tops are cut off, and the carrot-like taproots are dug up and stored in a cool, dark place for a month or two until a second pale white and yellow head grows from the roots.

Source: https://gardenerspath.com/plants/vegetables/grow-belgian-endive/