*I usually use leftover baked potatoes or I boil extra potatoes when making mashed potatoes for this. If you boil your potatoes, they usually take about 30-35 minutes until they are soft.
**If freezing, wrap with plastic wrap and then foil. Freeze for up to three months. Make slits into frozen crust and brush with egg white before baking. Bake at 375 degrees covered for 1 hour and uncovered for an additional 20 minutes.