Ingredients
4 medium beets, scrubbed well
Coarse salt and freshly ground pepper
4 dried mushrooms (morels and porcini; about 1/2 ounce)
1/2 cup hot water
Homemade Vegetable Stock
1/3 cup coarsely chopped celery leaves
2 tablespoons coarsely chopped fresh flat-leaf parsley
1 garlic clove, finely chopped
1 teaspoon sugar
Freshly squeezed lemon juice or citric acid, to taste
1/2 cup sour cream
1 tablespoon all-purpose flour
1/4 cup coarsely chopped dill
Preparation
Preheat oven to 400 degrees. Place beets on a piece of parchment paper – lined aluminum foil. Sprinkle with salt and pepper. Fold up edges of foil and parchment to enclose beets. Place on a small baking sheet, and bake until tender when pierced with the tip of a knife, about 1 hour. Let stand until cool enough to handle. Peel, and coarsely grate; set aside.
Soak mushrooms in hot water for 30 minutes. Drain through a fine-mesh sieve, reserving liquid. Coarsely chop mushrooms; set aside.
In a medium stockpot, combine stock, beets, mushrooms, mushroom liquid, celery leaves, parsley, garlic, sugar, a large pinch of salt, and a large pinch of pepper. Bring to a boil, reduce to a simmer, and cook for 20 minutes.
Add lemon juice or citric acid. Taste, and adjust for seasoning. In a small bowl, combine sour cream and flour, stirring until no lumps remain. Whisk in a ladleful of soup, then whisk the sour-cream mixture into the soup. Cook until slightly thickened, about 2 minutes. Stir in dill just before serving.
