Note: If available, beef bones, ... soup base. Cook lentils in beef stock in a ... fresh spinach. If using baby spinach, cook only 5 ... freshly grated Parmesan cheese.
In a 3-1/2 to 4-quart slow cooker, combine lentils, celery, carrots, and onion. ... 4 hours. If using low setting, turn to high ... hearty, healthy, tasty soup.