In a large pot, bring water to a boil. Add peeled and diced potatoes.
Cook until potatoes are fork tender and drain.
Preheat oven to 350F.
Spray a 2 quart or 8x8 baking dish with nonstick spray.
In a large bowl, mash the potatoes and add butter, sour cream, milk, and spices.
Spoon into the prepared baking dish, top with bacon, green onions, and cheese.
Bake uncovered for 15-20 minutes or until the cheese is melted.
Remove and serve warm.
Enjoy.