||Roll out each ball of pizza dough on a flat, floured surface to make an 8 to 10-inch oval flatbread shape. Preheat grill to medium heat.
||Brush top of dough with oil and transfer to grill using a floured baking sheet or pizza stone. Place on grill, oil-side-down. Brush top with more oil. Cook until lightly golden on grilled side of flatbread (about 1-2 minutes). Turn over. Turn heat to low or place flat bread on a sheet of foil.
||Top each flatbread with 1/4 cup Alfredo sauce, 12 slices of sausage, 1/4 cup chopped tomatoes, 2 tablespoons shredded arugula and a sprinkle of Parmesan cheese, if desired. Close the grill cover/lid over the flatbread and cook the flatbread until the sausage is heated through (about 2 minutes).