Preparation Place first 4 ingredients in processor. Blend until smooth. Add 1/4 cup broth. Season to taste with salt and pepper. Blend to mix. Transfer soup to bowl. Cover and refrigerate. Place tomatoes, bell peppers and sugar in clean processor. Blend until smooth. Add tarragon leaves. Season with salt and pepper. Blend 30 seconds. Transfer to bowl. Cover and chill. (Both soups can be made 4 hours ahead.) If avocado soup is very thick, thin slightly with more broth. Ladle both soups simultaneously into each soup bowl. Garnish each with dollop of sour cream and tarragon sprig.
Preparation Place first 4 ingredients in processor. Blend until smooth. Add 1/4 cup broth. Season to taste with salt and pepper. Blend to mix. Transfer soup to bowl. Cover and refrigerate. Place tomatoes, bell peppers and sugar in clean processor. Blend until smooth. Add tarragon leaves. Season with salt and pepper. Blend 30 seconds. Transfer to bowl. Cover and chill. (Both soups can be made 4 hours ahead.) If avocado soup is very thick, thin slightly with more broth. Ladle both soups simultaneously into each soup bowl. Garnish each with dollop of sour cream and tarragon sprig.