INGREDIENTS
•
6 Tbs. unsalted butter
•
1/2 lb. button mushrooms, quartered
•
1 cup chopped leeks, white and pale green parts
•
1/2 cup finely diced carrots
•
1/3 cup fresh or thawed frozen peas
•
1/3 cup plus 1 Tbs. all-purpose flour
•
4 1/2 cups chicken stock or broth
•
1/3 cup dry sherry
•
2 tsp. minced fresh tarragon
•
4 cups cooked, shredded chicken
•
Kosher salt and freshly ground pepper
•
Double-crust flaky pastry dough
•
1 large egg