Preheat oven to 350*. Lightly grease/spray a 15x10 cookie sheet (sheet pan).
Spread pizza crust evenly on prepared sheet pan.
Spread cooked sausage evenly on top of crust
Top with hash brown potatoes and cheddar cheese.
In a small bowl, beat together eggs, milk, salt, and pepper until mixed well. Pour carefully over top of pizza.
Sprinkle top of pizza with parmesan cheese.
Bake in preheated oven at 350* for approx 25-30 minutes or until pizza is cooked through and lightly brown on top. Remove from oven and serve warm.
NOTE: CAN BE PUT TOGETHER THE NIGHT BEFORE AND REFRIGERATED UNTIL COOKING THE NEXT MORNING, if desired.