Creamy Chicken Risotto with Courgette and Saffron

Ingredients

• 300g chicken breast
• 400g Vialone Nano rice – or Carnaroli or Arborio
• 500ml chicken stock
• 1 large onion chopped finely
• 1 stick of celery chopped very finely
• 2 courgettes
• 50g butter
• 125ml white wine
• Good pinch saffron
• Small handful grated Parmesan cheese
• Salt and pepper