Preheat oven to 450 and cook the bacon until crispy, crumble it and set aside
Press or roll the dough out to a circle or, like I did, to fit the cookie sheet. Transfer to lightly greased cookie sheet*
Sprinkle the chopped garlic and ¼ cup of the mozzarella on the dough
Crumble the mashed potatoes evenly over the pizza, don't try and cover the whole thing just add enough all over so each slice gets some
Top with the bacon, scallions and remaining mozzarella
Sprinkle the parmesan on the crust of the pizza for added flavor
Cook for 15-20 minutes till crust is cooked and the top is golden brown
Wait 5 minutes before slicing, I sliced into 18 slices
Notes
I like to use the cookie sheet and really roll the dough out and get the most out of the pizza dough, you might not get as many slices if you are making a circular pie.