Corned Beef Hash Rustic Pie

Ingredients (16)

• 1-3/4 cups all-purpose flour
• 1 teaspoon kosher salt
• 1 teaspoon sugar
• 1/2 cup plus 2 tablespoons cold unsalted butter, cubed
• 2 to 4 tablespoons cold lager beer or beef broth
• POTATOES:
• 2 medium red potatoes, cut into 1/4-in. cubes
• 1/2 teaspoon kosher salt
• 3 green onions, chopped
• 2 tablespoons unsalted butter, cubed
• 1 tablespoon stone-ground Dijon mustard
• 1/2 teaspoon pepper
• RUSTIC PIE:
• 1/2 pound thinly sliced deli corned beef
• 1/4 pound sliced provolone cheese
• 1 tablespoon cold whole milk or heavy whipping cream