Start by chopping garlic, onions, and carrots. Find a large pot and add a good dollop of butter to the pot. Let the butter in the pot melt. Now add your onions and sugar, and stir for a couple of minutes. Add the chopped tomatoes, carrots, salt, pepper, and dried basil. After this, add your liter of vegetable broth.  Then simmer on low heat, covered, for 20 minutes. Blend the soup until it is completely smooth, and all ingredients are blended. When the soup is blended, it is ready to serve. Serve with baguettes and pasta on the side.