Codfish Shepherds Pie - Riberalves

Ingredients

• 600 g deep-frozen soaked codfish Riberalves
• 1 package of frozen puff pastry
• 1 cup of bread crumbs
• 200 g of butter
• 2 onions
• 4 teaspoons of flour
• 4 cups of milk tea
• 4 eggs
• Salt and pepper
• 1/2 nutmeg
• 1 egg yolk