Leek and sweet potato soup with thyme

Leeks and sweet potatoes sauteed with garlic, chicken broth added, then simmered for about 30 minutes and blended with an immersion blender.
3 good sized leeks
3 sweet potatoes
8 cloves of garlic
6 sprigs of thyme
3 large bay leaves
64 oz chicken broth
No salt
Immersion blender for the end.