Place meat and bones in pressure cooker with enough water to cover. Bring to a boil and skim. Pour off all but 2 1/2 cups of the broth and set aside. Add cinnamon stick to broth and bones in the pressure cooker and cook under pressure for 30 minutes. Reduce pressure. Remove meat and bones. Add rice or noodles and the reserved broth to the pot and cook under pressure eight minutes. Open cooker. Season to taste. Return meat to soup and heat to boiling. Serve in soup bowls garnished with chopped parsley. For variety, add several small whole carrots, a tomato cut in half, several small summer Squash and a chopped stick of celery to the broth before adding the rice or noodles.