Parmesan

Ingredients    

• 100g pancetta    
• 50g pecorino cheese    
• 50g parmesan    
• 3 large egg yolks   
• 350g spaghetti    
• 2 plump garlic cloves, peeled and left whole    
• 50g unsalted butter    
• sea salt and freshly ground black pepper

Serves 4