In a heavy plastic bag, combine pork strips and dressing; refrigerate several hours or overnight. Drain off marinade, discarding marinade. Heat a 12-inch nonstick skillet over medium-high heat; add pork strips to the pan and cook, stirring frequently, for 8 minutes or until pork strips are lightly browned. Divide pork strips into 4 equal portions and place on bottom halves of buns. Spoon on 1 tablespoon of pizza sauce for each sandwich. Top with slice of mozzarella cheese. Bake in a 350 degrees F. oven for 5 minutes, or until cheese melts and bun is lightly toasted.