Creamy Whipped Potato Casserole

This is a new dish this year.  It is a bit of a change from our normal mashed potatoes!!  This is a blend of a couple of different types of potatoes that are mashed with a few extra special ingredients including a bit of parmesan cheese and baked into a delicious casserole.
 
*Small sides will serve approximately 6-8 as a side dish and large sides will serve approximately 12-16*