This may be served hot as a casserole or reduce the melted butter amount down to 2 tablespoons and serve as a cold potato salad, either way it's delicious! --- If you are serving hot as a casserole I strongly recommend to have the potatoes cooled to room temperature before using in this recipe or use cold potatoes that have been cooked a day ahead, I have even made this using about 5 cups of thawed frozen hash browns, the complete casserole may be assembled and refrigerated for up to 2 days ahead before baking although it's so delicious cold it might not even make it to the oven, and also makes a large amount which makes this *perfect* dish for potlucks --- if you are baking as a casserole use only mayonnaise such as Hellman's using salad dressing will not be as good.
This is a dish my family and friends ask me to bring to potluck/cook-outs! NEVER any left to bring home! (my sister brings a bowl to take what MIGHT be left) Taste great hot out of the oven or "room temperature"
My idea of perfect scalloped potatoes. The more flavor the beef stock has, the better the final dish will be. If this isn't rich enough for you double the amount of butter. It will add smoothness as well. There is no salt called for so if your stock is saltless, add a sprinkling to each layer.