Ingredients
Instructions
- In medium saucepan, heat the oil over medium.
- Add the onion and saute until softened, about 4 minutes.
- Add the tomatoes and water, then bring to a boil.
- Reduce heat and simmer until the vegetables are tender, about 5 minutes.
- Transfer the soup to a food processor or blender and puree until smooth, in batches, if necessary (use caution when blending hot liquids).
- Set a strainer over the saucepan.
- Pour the puree through the strainer, pressing on the solids with a wooden spoon or spatula to extract as much of the pulp as possible; discard the seeds and skin.
- Whisk the sour cream and tarragon into the soup.
- Stir over low heat until the soup is hot, but not boiling.
- Season with salt and pepper.