Slow Cooker Lentil - Rice Soup

1 c brown lentils
1 c brown rice
2 carrots diced
2 stalks celery diced
1 med. onion diced
1 clove garlic minced
1/2 tsp dried sage
10-12 cups veg broth
1 cup baby spinach chopped


Add all the ingredients except spinach to slow cooker. Cook on low 8 hours. Add the 10 cups of broth at first, and add more if it seems you need more.
Add chopped spinach for the last 30 minutes of cooking.