ROASTED-TOMATO SOUP WITH PARMESAN WAFERS

Steps:

• Preheat oven to 350°F with rack in middle.
• Arrange tomatoes, cut side up, in 1 layer in a large 4-sided sheet pan and add garlic to pan. Drizzle tomatoes with oil and sprinkle with 1/2 teaspoon salt and 1/4 teaspoon pepper.
• Roast tomatoes and garlic 1 hour, then cool in pan. Peel garlic cloves.
• Cook onion, oregano, and sugar in butter in a 6-to 8-quart heavy pot over medium-low heat, stirring frequently, until onion is softened, about 5 minutes.
• Add tomatoes, garlic, and stock and simmer, covered, 20 minutes.
• Purée soup in batches in a blender (use caution when blending hot liquids), then force through a sieve into cleaned pot, discarding solids. Stir in cream and salt and pepper to taste and simmer 2 minutes.
• Divide soup among 8 bowls and float 1 wafer in center of each.