2 cups all-purpose flour for lid
1/2 teaspoon sea or table salt for lid
13 tablespoons unsalted butter diced, for lid
6 tablespoons sour cream or Greek-style yogurt for lid
1 tablespoon cider vinegar for lid
1/4 cup cold water very, for lid
1 egg beaten with 1 teaspoon water, for egg wash
salt to taste, for filling
freshly ground black pepper to taste, for filling
3 1/2 to 4 pounds bone-in, skin-on chicken parts (breasts, thighs, and drumsticks)
1 to 2 glugs olive oil for filling
2 medium leeks white and light green parts only, cut in half lengthwise and then into 1/2-inch slices
1 large onion diced small
1/4 cup dry sherry optional
3 cups low-sodium chicken broth for filling
1/4 cup milk or heavy cream for filling
1 teaspoon minced fresh thyme for filling
3 tablespoons unsalted butter at room temperature, for filling
4 1/2 tablespoons all-purpose flour for filling
1 cup green peas fresh or frozen
2 large carrots diced small (about 1 cup)
2 tablespoons flat-leaf parsley chopped