Directions

1. Melt butter in a medium saucepan over medium-low heat. Add onion and garlic, and cook, stirring until translucent, about 6 minutes.
2. Add tomatoes, stock, and oregano; bring to a boil. Reduce heat, and simmer gently until thickened, about 45 minutes. Remove oregano sprigs. Puree using an immersion blender, or in batches in a blender.
3. Slowly add 1/2 cup half-and-half, stirring constantly, until desired consistency is achieved. Season with salt and pepper.
4. In a small bowl, combine sour cream with remaining 2 tablespoons half-and-half; transfer to a squeeze bottle. Draw a spiral shape on surface of soup; carefully drag a toothpick from the center of the spiral to the perimeter of the soup. Repeat around perimeter to create a spider web. Serve immediately.