Beetroot and Carrot energy boost soup

I was reading about the energy boosting properties of beetroot and though 'I could do with a bit of that!'.

I'd never cooked raw beetroot before but this soup was a doddle- and so good, hearty and warming. What you will get is more of a puree than a soup- dilute with hot water, chicken or vegetable soup, and to curries etc if you feel daring!

Beetroot and Carrot Soup- makes enough to eat for a week and freeze for another two! 
Two medium sized onions- chopped
Knob of butter/ olive oil
Two kg carrots, peeled and chopped into rounds
5 small beetroot (about  750 g) peeled and diced small (they will take longer to cook than the carrots)
Thumb sized piece of ginger (diced)
Two cloves of garlice
Pinch of salt
Black peppercorns
Bay leaves (two)

Put the oil or butter into your largest pan, on a low/medium heat and saute the onion under transparent. Add the other ingredients and braise, making sure that it doesn't burn- you may wish to add an inch of water to make sure.

Put the lid on and leave to cook for about an hour- 1 1/2 hours- until all of the vegetables are delicious and tender. Blitz the soup and you will have the most beautiful, ruby-red puree!