Best Lentil Soup

Directions

Cook onion in oil in large pot until just starting to get glossy and soft.

Add carrots, garlic, bay leaves, and celery and cook until onion is nearly translucent.

Empty mixture into crock pot and add tomatoes, lentils, broth, and water.

Cook on low all day. Add spinach for last 30 minutes.

Just before serving, salt and pepper to taste and vinegar to taste (5 T).

Serve with fresh ricotta if desired.