What white vegetable is often mashed or puréed and used as a low-carb potato alternative?

Cauliflower

Who planted the first vineyard mentioned in the Bible? In exchange for her voice, what does Ariel wish for in "The Little Mermaid"? What do plants need from the sky to grow, apart from sunlight? Which empire expanded under the military leadership of Timur in the 14th century? What unit is used to measure sound intensity?