Preheat oven to 375° F. Separate crescent rolls into sixteen triangles. Place in two ungreased 12-inch rimmed pizza pans with points toward the center. In each pan, press rolls together, seal perforations and form a circle 1-inch larger in diameter than bottom of pan. Turn edges under to make a slight rim. Sprinkle cooked sausage evenly over each crust. Top with potatoes; add peppers and/or green onions, if desired. Sprinkle with Cheddar cheese. Combine eggs, milk, salt and pepper in small bowl: stir well. Pour half of the egg mixture evenly over each pizza. Sprinkle with Parmesan. Bake for 15 to 20 minutes or until eggs are set and crusts are golden.