Cook the carrots, parsley, celery and 1 onion in 4 cups salted water for 20 minutes. Strain. Cook the mushrooms and second onion in 1 cup water for 10 minutes. Add salt and pepper. Combine with vegetable broth, add the flour mixed with quarter cup cold water. Boil. Remove from heat. Add sour cream, dill and parsley. Add noodles, fine macaroni.