I love postatoes...

Yes, I meant to say "pos-tatoes"...just a quirk of mine—I don't even know why I say it.
Somewhere I have a recipe for a twice-baked potato casserole, which I will have to track down, cause it's really good, too. But these are yummy:

Twice-Baked Buttermilk Potatoes

2 large baking potatoes
2 T. butter, melted
1/2 c. buttermilk
1 c. sharp cheddar, finely shredded
1 T. fresh minced chives –OR- 1 t. dried chives
1/4 t. garlic powder
salt and freshly ground pepper to taste
paprika for garnish

1. Microwave the potatoes until tender but still firm, about 4 minutes.
2. Allow to cool—at room temperature, they have less chance of falling apart when you scoop them out.
3. Heat oven to 350˚.
4. Scoop out the centers, leaving a firm, 1/4-inch-thick shell.
5. Mash the scooped part in a small bowl, then stir in the melted margarine, buttermilk, and seasonings.
6. Fill the shells; dust the tops with paprika.
7. Bake at 350˚ for 15 to 20 minutes, or until heated through.