Christmas Baked Cod (Portugal)

Breadcrumbs

• 100 g cornbread cut in pieces
• 15 g olive oil plus extra for greasing
• 1 garlic clove
• 1 Tbsp fresh coriander leaves

Olive Topping

• 100 g pitted black olives
• 20 g olive oil
• 1 tsp dried oregano
• 1 tsp grated Parmesan cheese
• ½ lemon juice only
• 1 pinch ground black pepper
• 1 pinch fine sea salt

Cod

• 800 g water
• 500 g floury potatoes peeled, cut in pieces (4 cm)
• 2 pinches fine sea salt
• 100 g onions quartered
• 65 g olive oil
• 2 garlic cloves
• 800 g cod fillet, skinless cut in pieces (4 cm)
• 2 medium eggs separated
• 70 g double cream