How to Make It
Tie together poultry herb mix with kitchen twine. Place soaked beans, herbs, water, stock, cheese rinds, and onion halves in a large Dutch oven, and bring to a boil over high. Reduce heat to medium-low; cover and simmer 1 hour. Stir in salt; cover and simmer until beans are very tender, 30 to 45 more minutes. Remove and discard rinds, or reserve for another use. Stir in spinach, tomatoes, zest, and pepper. Simmer, uncovered, until greens are wilted, 3 to 4 minutes. Spoon into shallow bowls. Top with grated Parmesan and chopped parsley.
Total time includes 8 hours soaking.