Preheat oven to 350F Wash and peel potatoes. Cut potatoes into quarter size slices. Boil until fork tender. You want them a little under cooked because they will cook more in the oven. Drain water from potatoes and pour melted butter over potatoes. In a skillet cook ground turkey and beef over medium heat until brown. Make sure you drain grease from meat. Add sliced sausage in a skillet and stir frequently until brown. Cut Velveeta cheese into cubes.In a baking dish add a layer of potatoes, Velveeta cheese, ground meat and shredded cheese on top, repeat this step until all ingredients are used. Bake on 350 for 25-30 minutes or until cheese is melted ** You can season both ground turkey and beef with seasonings of your choice