Big batch minestrone

For the soup

• 2 tbsp olive oil
• 2 onions, diced
• 3 carrots, diced
• 3 celery sticks, diced
• 3 garlic cloves, crushed
• 2 courgettes, diced
• 1 x 400g tin chopped tomatoes
• 2 tbsp tomato purée
• 1.6 litres vegetable stock
• 2 x 400g tins cannellini beans, drained and rinsed
• 200g green beans, trimmed and cut into short lengths
• 2 tsp dried Italian herbs
• 1 tsp salt

To serve

• 160g small soup pasta, such as ditalini
• Fresh basil