Turkey Potpie With Biscuit Crust

Name: Turkey Potpie With Biscuit Crust
Ingredients: 1 to 1 1/2 cups cooked turkey meat; 1/2 pound cooked sweet potato, cut into 1-inch pieces (about 1 cup); 1 medium zucchini, cut into 1/2-inch pieces; 1 large carrot, peeled and cut into 1/4-inch pieces; 3 scallions, trimmed and thinly sliced; 1 tablespoon fresh thyme, or 1 teaspoon dried leaves; 1 teaspoon kosher salt; freshly ground black pepper; 1 1/4 cups turkey gravy; 1 17.3-ounce package refrigerated corn biscuits