Preheat panini press* on medium heat. Spread honey mustard evenly over each slice of bread. Layer apple slices and cheese over 4 slices of bread, using about 1/2 apple and 2 ounces cheese for each sandwich. Top each with remaining bread slices. Lightly coat panini press with cooking spray. Grill each sandwich for 3 to 5 minutes or until cheese has melted and bread has toasted.