Slow Cooker Italian Vegetarian Bean Soup

INGREDIENTS

1 lb

dry Great Northern Beans

ribs of celery, finely chopped

small onion, finely chopped

carrots, peeled and finely chopped

1 tbsp

fennel seeds

2 tsp

dried oregano leaves

2 tsp

garlic powder

1/4 tsp

red pepper flakes (optional)

Salt and pepper

6 tbsp

finely grated parmesan cheese (opt)