Traditional Irish cod fish cakes recipe from an Irish American Mom recipes

Name: Traditional Irish cod fish cakes recipe from an Irish American Mom recipes
Ingredients: butter; 1lb cod fillets; 1/4 teaspoon black peppercorns; 1 Small onion (peeled and sliced); 1 cup milk; 2 cups mashed potatoes; 1lb flaked cooked cod; 2 tablespoons finely chopped parsley; 1 or 2 cloves minced garlic; 1 Small egg (for binding the fish cakes); 1/4 teaspoon black pepper; 1/2 teaspoon salt; 1/2 cup flour (for dusting the fish cakes); 2 Large beaten eggs (for coating the fish cakes); 1 cup fine breadcrumbs (for coating the fish cakes); fishcake; 1/2 cup grated Parmesan cheese