Scrub and chop the carrots (peel if you want to) and chop the onion
Saute the onion in a tablespoon of olive oil for 5 minutes then add the carrots for a couple of minutes
Add the stock and lentils to the pan and bring to boil then cover and lower heat to a simmer for about 25 minutes till everything is tendera
Use a stick blender to whizz the soup as smooth as you fancy and season to taste
