Cook carrots and onion in margarine in large saucepan or Dutch oven over medium-high heat 2-3 minutes or until onion is tender. Add 2 cups broth, tarragon, and pepper. Reduce heat; simmer 10 minutes. Combine vegetables and broth in food processor or blender; process until smooth. Return to saucepan. Add remaining 2 cups broth and rice; thoroughly heat. Dollop soup cream on each serving of soup. Garnish with parsley.
