Luxury Fish Pie with Parmesan and Garlic Sweet Potato Mash

• 1000 g sweet potatoes
• 1 garlic bulb
• 30 g Parmesan cheese, cut in pieces (2 cm)

Filling

• 100 g onions, quartered
• 6 cloves
• 2 bay leaves, fresh or dried
• 250 g cod fillet, skin removed, cut in pieces (5 cm)
• 250 g smoked haddock, skin removed, cut in pieces (5 cm)
• 250 g raw prawns, peeled
• 600 g whole milk
• 4 medium eggs, hard-boiled, quartered
• 30 g salted butter
• 20 g plain flour
• ½ tsp fine sea salt
• ¼ tsp ground black pepper

Sweet Potato Topping

• 30 g unsalted butter
• ¼ tsp cayenne pepper
• 2 pinches fine sea salt
• 2 pinches ground black pepper