I love beetroot, that is  the taproot portion of the beet plant
I am not familiar with it.  What do you do with beetroot.
Most times it is grown for their edible taproots and their leaves 
do you cook it prior to eating it?
That depends on the use because Many beet products are made from other "Beta vulgaris" varieties
Are they bitter?
I do not think so because beets have use as a food colouring