How to Make It
Spread 1 tablespoon pepper jelly on each of 4 bread slices. Top each with 2 ounces turkey, and sprinkle evenly with salt and pepper. Divide arugula evenly among sandwiches, and top each with 2 mozzarella slices. Spread remaining 1/4 cup pepper jelly evenly on remaining 4 bread slices, and place, jelly side down, on each sandwich.
Brush a preheated panini press with melted butter, and cook sandwiches until golden, 2 to 3 minutes. Serve immediately.