Press rolls onto 12" pizza pan to make a crust. Spread out evenly over the entire pan, until you have a full pizza crust.
Brown sausage, crumble, and drain. If using bacon, fry until crisp, drain, and crumble. If using veggies, saute in butter for a few minutes and drain.
Layer meat of choice on crust and top with the potatoes and cheese.
At this point you can cover the pizza and put in the freezer if you want to serve it at a later date. When you are ready to use, take the pizza out and combine eggs, milk, salt and pepper in a bowl; mix well.
Pour liquid over layers and sprinkle with parmesan cheese.
Bake at 350 for 30 minutes. If the pizza has been frozen, you will have to cook a little longer. Just make sure the center is cooked through.