Have you seen a kind of purple fluffy leaves which smell like cumin when you rub them?

They are beefsteak plants. Not all of them are purple, instead, some are green. They are frequently seen in rotisseries. If you wrap up the meat with beefsteak plants, there will be a special taste and the greasiness will be swept away.

The reason why beefsteak plants smell like cumin is the perillaldehyde in them which endow them with special fragrance. Beefsteak plants can not only be used as the seasoner which increase flavor of food, but also can be used to make perilla oil to process tobacco, make cakes or toothpaste, etc.