2. Hollow out top half of ciabatta rolls. Spread mustard on bottom halves. Sprinkle with 4 oz. of the cheese; set aside.
3. Cook mushrooms in oil in large skillet on medium heat 4 minutes. Add sausage, shallots and garlic. Cook 2 minutes. Stir in spinach. Cook 1 minute.
4. Spoon mixture onto bottom of rolls. Sprinkle with remaining 4 oz. of the cheese. Cover with top of rolls. Wrap sandwiches in foil. Place on half sheet pan. Bake 10 to 12 minutes or until heated through and cheese is melted.
Nutritional information per serving: Calories 710; Total Fat 42g; Saturated Fat 17g;