Slow-Cooker Spinach Bean Soup

Ingredients

• 1 pound dried navy beans
• 2 cartons (32 ounces each) chicken broth
• 2 cups water
• 1 smoked turkey wing (about 7 ounces)
• 1 medium onion, chopped
• 1 jalapeno pepper, seeded and finely chopped
• 1 tablespoon minced garlic
• 3 bay leaves
• 1 teaspoon pepper
• 1/2 teaspoon crushed red pepper flakes
• 10 cups chopped fresh spinach (about 8 ounces)
• 1 large sweet red pepper, chopped
• 1/2 teaspoon kosher salt
• Grated Parmesan cheese, optional