Portuguese Cod Fish Casserole

Name: Portuguese Cod Fish Casserole
Ingredients: 8 cups potatoes, peeled & quartered; 3 whole garlic cloves; 6 cups salt cod fish, cooked and shredded; 6 large hard-boiled eggs, quartered; 1 cup green olives; 2 onions, halved; 3 garlic cloves, smashed; 3⁄4 cup olive oil; 3⁄4 cup white wine; 1 teaspoon ground cumin; 1 tablespoon paprika; 1 teaspoon garlic powder; 2 tablespoons ketchup; 1 teaspoon piri piri hot sauce (to taste); 1⁄2 teaspoon salt (to taste); 1⁄2 teaspoon black pepper; parsley, chopped (to decorate) (optional)