Christmas Baked Cod (Portugal)

Name: Christmas Baked Cod (Portugal)
Prep time: 10 min
Cook time: 1 h 15 min
Total time: 1 h 15 min
Yield: 6 portions
Ingredients: 100 g cornbread; 15 g olive oil; 1 garlic clove; 1 Tbsp fresh coriander leaf; 100 g pitted black olives; 20 g olive oil; 1 tsp dried oregano; 1 tsp grated Parmesan cheese; ½ lemon; 1 pinch ground black pepper; 1 pinch fine sea salt; 800 g water; 500 g floury potatoes; 2 pinches fine sea salt; 100 g onions; 65 g olive oil; 2 garlic cloves; 800 g cod fillet, skinless; 2 medium eggs; 70 g double cream