Instructions

1. Preheat the panini press. Using a pastry brush, brush the bread on both sides with the oil. Spread one side of each slice of bread with the raspberry jam. Sprinkle the rosemary over the jam.
2. Cut the mozzarella cheese into 8 slices. Place 2 slices each of cheese on 4 of the bread slices. Season the cheese with a pinch of salt, if using. Place the remaining slices of bread on top, jam-side down. Sprinkle the tops with the brown sugar.
3. Press in the panini press for 3 to 5 minutes until the cheese has melted and the bread is golden and crispy. Cut the panini in half and serve.
4. Cook's Note: If you do not have a panini press, you can use a grill pan. Preheat the pan, add the sandwiches (in batches, if necessary), and put a weight (such as a brick wrapped in foil or a heavy cast-iron skillet) on top to press them down. Grill for 2 to 3 minutes to brown the first side, flip the sandwich, replace the weight, and grill for 2 to 3 minutes to brown the other side and finish melting the cheese.