Navy Bean Soup With Kale And Lemon - Delicious and Vegan

Ingredients

• 3 tablespoons olive oil
• 1 large sweet yellow onion, finely diced
• 2 medium carrots, peeled and finely diced
• 3 celery ribs, thinly sliced
• 6 cloves garlic, minced
• ½ kilo of Maris Piper potatoes, small diced
• 1.2 kilo Navy beans
• 2.2 litres of vegetable broth
• 1 ½ teaspoons lemon zest
• 1 ½ teaspoons dried tarragon*
• ¾ teaspoon rock salt, or more to taste
• Fresh ground black pepper
• 5 to 6 leaves Black Tuscan Kale, chopped into small pieces