Risotto al Limone con Carpaccio di Gamberi

Ingredients

• 100 g white onion
• 1/2 clove garlic
• 2 bay leaves
• 30 grains black pepper
• 1 sprig of lemon thyme
• 440 g salted butter
• 2 packets of saffron
• 400 ml filtered lemon juice
• 2 lemons
• 5 tbsp extra virgin olive oill
• 1 kg head of prawns
• 2 tbsp brandy
• 1 stalk of celery
• 4 shallots
• 1 carrot
• 1 star anise
• 10 white pepper grains
• 1 spring of thyme
• 2 leaves of basil
• 1/2 leaves of bay
• 2 tbsp tomato concentrate
• 400 ml white wine
• 1000 ml fish stock
• 6 prawns
• 240 g rice for risotto
• 1 l fish broth