Really Good White Bean Soup

Bahan-bahan (6 porsi)

• 1 pound (454g) dried white beans, (such as cannellini or great northern (see Note 1))
• 1 ½ tablespoons Diamond Crystal kosher salt ((see Note 2))
• 2 teaspoons baking soda
• 4 ½ tablespoons extra-virgin olive oil, (divided)
• 1 large yellow onion, (diced (~ 2 cups))
• 3 medium carrots, (diced (1 to 1 ½ cup))
• 3 celery ribs, (diced (~ 1 cup))
• Kosher salt and freshly ground black pepper
• ½ to 1 teaspoon red pepper flakes ((1 tsp for spicy))
• 6 to 7 cups (1.5 to 1.7 L) filtered water ((see Note 3))
• 1 large or 2 small rosemary sprigs ((or 8 to 10 thyme sprigs))
• 1 large or 2 small sage sprigs
• 2 bay leaves
• 2 teaspoons Better than Bouillon “no chicken” base ((see Note 4))
• 2 medium heads of garlic
• 1 tablespoon white miso
• 1 handful of flat-leaf parsley (chopped (optional))
• Crusty bread to serve 4 to 8