Herbed Fish-and-Rice-Stuffed Pastry | Saveur

Ingredients

• 1 tsp. active dry yeast
• 1 tsp. sugar
• 12 tbsp. plus 1 tsp. unsalted butter
• 2 cups flour, plus more as needed
• ³⁄₄ cup sour cream
• ¹⁄₂ tsp. kosher salt, plus more to taste
• 3 eggs (1 whole, 2 hard-cooked and finely chopped)
• 2 tbsp. peanut oil
• 1 (8-oz.) boneless skinless salmon filet, cut into 1⁄2" pieces
• 1 (8-oz.) boneless skinless cod filet, cut into 1⁄2" pieces
• 1 yellow onion, finely chopped
• 10 oz. button mushrooms, finely chopped
• 1 cup cooked white rice
• 3 tbsp. finely chopped dill
• 2 tbsp. finely chopped flat-leaf parsley leaves
• 2 tbsp. vermouth
• 1 tbsp. fresh lemon juice
• 1 pinch freshly grated nutmeg
• Freshly ground black pepper, to taste
• 3 tbsp. dried bread crumbs
• 1 tsp. milk
• 1 egg yolk