Chef John's Cornish Pasty

Details

Ingredients

• 4 cups bread flour
• 3 ounces cold lard
• 2 ounces cold butter
• 1 ½ teaspoons salt
• ⅔ cup ice water, or as needed
• 12 ounces beef skirt steak, cubed
• 1 cup diced Yukon Gold potatoes
• ½ cup diced onion
• ⅓ cup diced turnip
• 1 ½ teaspoons salt
• 1 teaspoon freshly ground black pepper
• 1 pinch cayenne pepper
• 2 tablespoons butter, cut into 8 thin slices
• 1 large egg, beaten
• 1 teaspoon water