Potatoes and carrot soup

Hi guys

just so I won't forget to practice, I wanted to post this soup recipe for you.
It is very similar to the one Natália has already published, but it is a bit different. :-)
So here it is.

Ingredients:
- two carrots, sliced
- three to four medium-size white potatoes, in chunks
- 1 onion, chopped or grated
- 1/2 tbsp butter
- 1 1/2 glass of milk

* Cook the carrots and the potatoes until they are very soft. Put them aside, but don't throw the water away.
* Chop or grate the onion and fry it on the butter until soft and gold.
* In a blender, put the fried onion, the potatoes, carrots with half the water they were cooked in, and the glass of milk. Mix everything together. You can add a bit more of the water if it is too thick.
* Put the soup back in the pan and simmer until it boils.

Serve with bread and a mature cheese.