Cut bread halves lengthwise, cutting to but not through opposite side.
Spread mustard on cut sides of bread.
Layer with
Baked Pork Loin Roast and next 3 ingredients. Close sandwiches, and spread outsides with butter.
Place 1 sandwich in a hot, large skillet over medium heat.
Place a heavy skillet on top of sandwich. Cook 2 to 3 minutes on each side or until cheese is melted and sandwich is flat. Repeat with remaining sandwich.
Cut each sandwich in half, and serve immediately.
*1/3 lb. thinly sliced Slow-Cooker Pork Butt Roast may be substituted.