Cabbage soup

Name: Cabbage soup
Ingredients: 2 tbsp olive oil; 1 large onion, finely chopped; 2 celery sticks, finely chopped; 1 large carrot, finely chopped; 70g smoked pancetta, diced (optional); 1 large Savoy cabbage, shredded; 2 fat garlic cloves, crushed; 1 heaped tsp sweet smoked paprika; 1 tbsp finely chopped rosemary; 1 x 400g can chopped tomatoes; 1.7l hot vegetable stock; 1 x 400g can chickpeas, drained and rinsed; shaved parmesan (or vegetarian alternative), to serve (optional); crusty bread, to serve (optional)