Beet Soup!

Going through my camera, I found this photo - which I took while making this beet soup that my mother had made...at the risk of turning this into a food blog (no chance of that), I figured I'd repost it. It's completely delicious and I thought it looked cool too in the green Dutch Oven my awesome brother and sister-in-law bought us for our wedding...
Serving Size: 6
Cuisine:
Main Ingredient: Beets
Categories: Low Fat, Soup, Appetizers
-= Ingredients =-
1 teaspoon olive oil
1 medium onion ; peeled and finely chopped (about 2 cups)
2 large or 3 small cloves garlic ; peeled and finely chopped
6 medium beets ; (about 1 1/2 pounds), finely chopped
1 small baking potato ; peeled and finely chopped
1 large celery stalk ; finely chopped
5 cups vegetable stock
1 tablespoon fresh basil leaves ; chopped or 1 teaspoon dried
1 tablespoon fresh thyme leaves ; chopped or 1 teaspoon dried
1/2 teaspoon sea salt 1/4 teaspoon freshly ground black pepper
Approximately ; 1/3 cup plain nonfat or low-fat yogurt for garnis
Approximately ; 3 tablespoons chives or scallion greens
-= Instructions =-
In large saucepan over moderately low flame, heat oil until hot but not smoking. Add onion and garlic and sauté, stirring, until translucent, 5 to 7 minutes. Add beets, potato, and celery, and stir to combine. Cover saucepan, reduce heat to low, and cook until beets begin to soften, about 5 minutes. Add stock, basil, thyme, salt, and pepper. Raise heat to moderate and bring to simmer. Reduce heat to moderately low, simmer covered until beets are very tender, about 25 minutes.
Using blender, purée soup in batches until very smooth, transferring to large bowl (use caution when blending hot liquids). Taste and add additional salt and pepper if desired.
Divide soup among 6 to 8 bowls. Top each portion with dollop of yogurt or use squeeze bottle to drizzle yogurt over each bowl. Sprinkle with chives or scallions and serve.