Ribollita

Name: Ribollita
Ingredients: 3 tablespoons olive oil; 1 large yellow onion, diced; 2 carrots, peeled and sliced; 2 large white sweet potato, chopped; 2 cups (200g) cabbage, coarsely chopped; 5 leaves kale, trimmed and chopped; 4 leaves Swiss chard, trimmed and chopped; 4 cloves garlic, minced; 1 teaspoon sea salt, plus more; 1 teaspoon freshly ground black pepper, plus more; 8 cups (2 liters) low sodium chicken broth; One 28 oz (800g) can petite diced tomatoes; 3 fresh sage leaves; 3 bay leaves; 1 teaspoon sea salt; 3/4 teaspoon freshly ground black pepper; Extra-virgin olive oil, for drizzling