Italian vegetable soup

INGREDIENTS

• 2 each of onions and carrots, chopped
• 4 sticks celery , chopped
• 1 tbsp olive oil
• 2 tbsp sugar
• 4 garlic cloves , crushed
• 2 tbsp tomato purée
• 2 bay leaves
• few sprigs thyme
• 3 courgettes , chopped
• 400g can butter beans , drained
• 400g can chopped tomatoes
• 1.2l vegetable stock
• 100g Parmesan or vegetarian equivalent, grated
• 140g small pasta shapes
• small bunch basil , shredded