Chunky Minestrone soup

Name: Chunky Minestrone soup
Ingredients: 3 large carrots, roughly chopped; 1 large onion, roughly chopped; 4 celery sticks, roughly chopped; 1 tbsp olive oil; 2 garlic cloves, crushed; 2 large potatoes, cut into small dice; 2 tbsp tomato purée; 2l vegetable stock; 400g can chopped tomatoes; 400g can butter or cannellini beans; 140g spaghetti, snapped into short lengths; ½ head Savoy cabbage, shredded; crusty bread, to serve