Thanksgiving Leftover Casserole (Easy 9x13 Dinner)

Ingredients

• 1 tablespoon unsalted butter, softened, for the dish
• 3 cups (360 g) prepared stuffing or dressing
• 3 cups (420 g) cooked turkey, chopped or shredded
• 2 cups (300 g) cooked mixed vegetables, chopped if large
• 1 1/2 cups (360 ml) turkey gravy
• 1/2 cup (120 ml) turkey or chicken broth
• 1/2 cup (140 g) cranberry sauce
• 3 cups (720 g) mashed potatoes
• 1 tablespoon melted butter, for the topping
• 1/2 teaspoon black pepper, or to taste
• 2 tablespoons chopped parsley, optional