Chilled Red Pepper and Beet Soup with Yogurt and Caraway Seeds

Name: Chilled Red Pepper and Beet Soup with Yogurt and Caraway Seeds
Ingredients: 2 tablespoons extra-virgin olive oil; 1 small onion, finely chopped; 1 teaspoon minced, peeled fresh ginger; 1/2 teaspoon caraway seeds, coarsely crushed; 2 large (8 to 9 ounces each) red bell peppers, stems, seeds, and ribs removed, cut into 1/4-inch dice; 1 large beet (about 8 ounces without greens), peeled and cut into 1/4-inch dice; 1 3/4 cups homemade or low-sodium store-bought chicken stock; 1/2 teaspoon coarse salt; Freshly ground pepper; 1/4 cup coarsely chopped fresh dill, plus sprigs for garnish; 1/4 cup coarsely chopped fresh cilantro; 1 tablespoon fresh lemon juice, or more to taste; 1/4 cup plain low-fat yogurt