This recipe is from Sofia Green Tour:

1 pound dried Great Northern beans, soaked in water for about 6 hours, rinsed and then cooked in water for 45 minutes to an hour until tender
2 tablespoons olive oil
1 1/2 cups diced onion
1 1/2 cups diced carrot
1 1/2 cups diced celery
2 cloves garlic minced
1/4 to 1/2 teaspoon crushed red pepper flakes
2 tablespoons sweet Hungarian paprika
1 tablespoon salt
1 teaspoon black pepper
10 cups water
1 large smoked ham hock
1/2 cup chopped fresh mint
3 tablespoons minced fresh winter savory ( or one teaspoon dried savory)
1/ 2 cup chopped fresh flat leaf parsley
Additional salt, black pepper and paprika for reseasoning

For preparation visit: