I read something in Cook's Illustrated about microwaving potatoes then finishing them up on the stove or in the oven to cut cooking time without losing the flavor you get from baking potatoes. It really does make a big difference in speed and the flavor is great! Here's what I made tonight:
some medium potatoes cut into quarters
pepper, salt, etc
In my au gratin pan, I stirred around the potatoes and seasonings and oil a bit.