Turkey Potato Casserole for 6 Servings

Instructions:

1. Combine the cubed turkey, sautéed onions, thawed vegetables, and thyme in a mixing bowl.
2. Fold in the turkey gravy until the meat is fully coated and the mixture is thick and glossy.
3. Transfer the mixture into a 9x13 inch baking dish, smoothing it into an even layer.
4. Whisk the sour cream into the mashed potatoes to ensure a velvety consistency.
5. Spread the potatoes over the turkey layer using a spatula, creating small peaks and valleys on the surface.
6. Sprinkle the shredded cheese evenly across the top and drizzle with melted butter.
7. Place the dish in a preheated oven at 375°F (190°C) and bake for 25-30 minutes until the edges are bubbling and the potato peaks are mahogany-brown.
8. Let the casserole rest for 5 minutes before serving to allow the gravy to set.