One Pot Pasta e Fagioli

Ingredients

• 2 tablespoons olive oil
• 1 medium onion, finely diced
• 3 cloves garlic, minced
• 2 stalks celery, finely diced
• 1 medium carrot, finely diced
• 1 sprig fresh rosemary (or 1/2 tsp dried)
• 1/4 teaspoon chilli flakes (optional)
• 2 tablespoons tomato paste
• 1 x 400g (14oz) can crushed tomatoes
• 2 x 400g (14oz) cans cannellini beans, drained and rinsed
• 1 litre (4 cups) vegetable stock or water
• 150g (5oz) ditalini, small macaroni, or broken spaghetti
• 1 teaspoon salt, or to taste
• 1/2 teaspoon black pepper
• 2 tablespoons extra virgin olive oil, to finish
• 30g (1oz) Parmesan or Pecorino, grated, to serve (optional)