- 2 tablespoons butter or olive oil
- 6 large leeks (white parts only), halved lengthwise and cut, ½-inch thick
- 3 medium baking potatoes, thinly sliced
- 1 medium onion, thinly sliced
- 2 cloves garlic, minced
- 6 cups Basic Vegetable Stock
- Bouquet Garni
- 2 teaspoons salt
- ½ cup dry white wine (optional)
- Black pepper
- Melt butter in a 3-quart soup pot and swirl it around until it coats the entire surface. Heat over high heat for 1 minute. Add the leeks, potatoes, onion, and garlic. Cook and stir until leeks and onion are tender, about 5 minutes.
- Add the Basic Vegetable Stock and Bouquet Garni. Bring to a boil. Reduce heat to simmering and cook for 30 minutes. Remove pot from heat. Cool for 15 minutes.
- Remove Bouquet Garni. Use an immersion blender to puree soup right in the soup pot. Stir in salt. If you like, stir in white wine. Cook 5 minutes more. Season to taste with pepper.