Preheat oven to 400°F (200°C). In large pot of boiling salted water, cook carrots and potato for 4 to 5 minutes or until almost tender-crisp; drain well.
In 9-inch (23 cm) cast iron skillet, melt butter over medium heat; cook onion, garlic and celery for about 5 minutes or until tender. Add carrots, potato, thyme, salt and pepper; sauté for 5 minutes. Sprinkle with flour; cook for 1 to 2 minutes. Whisk in milk, chicken broth and mustard; bring to boil. Reduce heat and simmer for 5 minutes or until slightly thickened. Stir in chicken and peas until incorporated.
On lightly floured surface, roll out pastry into a 10-inch (25 cm) square. Place pastry over filling, pressing edges to adhere to side of skillet. Brush egg over top of pastry. Bake for about 30 minutes or until pastry is golden and filling is bubbling. Let stand for 5 minutes before serving.
This decadent chocolate cake is a dream come true, with an irresistibly moist texture thanks to sour cream and buttermilk—perfect for celebrating with family and friends.
Warm up with a creamy mug of festive spices. Sweetened with maple and infused with cinnamon, clove, and nutmeg, this indulgent latte is perfect for celebrations or a quiet moment of relaxation.