01 - In a small bowl, gently toss the blueberries with honey and black pepper if using; set aside to allow flavors to meld.
02 - Spread a thin, even layer of cream cheese on one side of each bread slice, ensuring full coverage to the edges.
03 - Sprinkle shredded sharp white cheddar evenly over two slices directly on top of the cream cheese layer.
04 - Spoon the prepared blueberry mixture evenly over the cheddar layer on both sandwiches, distributing berries across the surface.
05 - Top with the remaining bread slices, cream cheese side down, to form complete sandwiches and press lightly to adhere.
06 - Generously butter the outsides of each sandwich, ensuring even coverage for optimal golden browning.
07 - Heat a large skillet or griddle over medium heat for 2-3 minutes until properly heated through.
08 - Place sandwiches in the skillet and cook for 3-4 minutes per side, pressing gently with a spatula, until bread is golden brown and cheese is completely melted.
09 - Remove sandwiches from heat, let rest for 1 minute to set, then slice diagonally and serve immediately while hot.