Fish Chowder Pie

Name: Fish Chowder Pie
Ingredients: 4 tablespoons unsalted butter; 2 leeks, washed and thinly sliced; 2 large yellow potatoes, diced; 3 cloves garlic, thinly sliced; 1/3 cup white wine; 2 cups whole milk; 8 ounces smoked trout; 6 black peppercorns; 1 bay leaf; salt and pepper to taste; 2 tablespoons all-purpose flour; 2 tablespoons chopped fresh parsley; 1/2 roll chilled phyllo