1 whole rotisserie chicken
4 cups good-quality chicken broth (see note)
2 tablespoons unsalted butter
1/2 yellow onion, diced
1 large carrot, peeled and diced
1 parsnip, peeled and diced
1 rib celery, diced
Kosher salt and freshly ground black pepper
1 1/2 teaspoons chopped fresh thyme
1 clove garlic, minced
1 bay leaf
2 tablespoons all-purpose flour
1 Yukon Gold potato, peeled and diced
1/2 cup frozen peas, thawed
2 tablespoons heavy cream
2 tablespoons chopped fresh parsley
2 sheets frozen puff pastry, thawed
2 large eggs, beaten