Bake potatoes until done, peel and slice into thin disks.
Coat a high sided pie pan with oil.
Layer the potatoes evenly across the bottom of the pan. Using the flat bottom of a glass, smash the potatoes down and up the edges to create an even layered crust about a quarter inch thick.
Brush the potatoes with butter, season with salt and pepper. Then sprinkle an even coat of parmesan cheese on the potato.
Bake at 400ºF for 40 to 45 minutes, until golden brown.
Pull from oven, add chopped veggies and filling of choice (quiche recipe, thickened beef stew or pot pie). Top with grated cheese.
Return to 400º oven and bake an additional 10 to 15 minutes, until heated through and the top is browned. Cool on a wire rack for 10 minutes and then cut into wedges and serve. This is easy to chill/freeze and reheat.