Irish Stew Pie

Directions

1. Preheat oven to 350°. In a shallow bowl, mix 1/2 cup flour, 1/2 teaspoon salt and 1/2 teaspoon pepper. Add lamb, a few pieces at a time, and toss to coat; shake off excess. In a Dutch oven, heat oil over medium-high heat. Brown lamb in batches. Remove from pan. Add carrots and onion to same pan; cook and stir until crisp-tender, 6-8 minutes. Stir in remaining 1 tablespoon flour until blended; gradually whisk in stock. Bring to a boil, stirring to loosen browned bits from pan.
2. Add potatoes, thyme, bay leaf, Worcestershire sauce, tomato paste, the remaining 1/4 teaspoon salt and 1/4 teaspoon pepper, and lamb; return to a boil. Reduce heat. Simmer, uncovered, until sauce is thickened and lamb is tender, 25-30 minutes. Discard thyme sprig and bay leaf. Stir in mint. Transfer to a greased 9-in. deep-dish pie plate. Whisk egg yolk and cream; brush around edge of pie plate to help pastry adhere.
3. On a lightly floured surface, unfold 1 sheet puff pastry; top with remaining sheet. Roll to fit over pie plate. Carefully place over filling; trim to fit. Using a fork, press crust firmly onto rim of pie plate to seal edge. Brush with remaining egg mixture; cut slits in top. Place on a rimmed baking sheet. Bake until golden brown, 35-40 minutes. Let stand 10 minutes before serving.