Heat oil in a medium saucepan over medium heat. Add onion and garlic; sauté until softened, 5 minutes. Add stock, carrot and thyme. Simmer, uncovered, until vegetables are very tender, about 40 minutes.
Purée soup in batches in a blender or food processor. Add salt and pepper. To serve hot, ladle into bowls and garnish with yogurt and dill. To serve cold, cool to room temperature. Cover and refrigerate until cold. Garnish just before serving.
DID YOU KNOW
that carrots are one of the sweetest vegetables? That may be why so many children who don’t like other vegetables enjoy eating them. People who are counting carbohydrates should eat carrots in moderation.