Heat panini press or grill top if using.
Place bread on plate top with diced tomatoes.
Sprinkle tomatoes with salt, pepper and basil leaves.
Top with sliced mozzarella and turkey. Finish with second slice of bread.
Cut in enjoy if you want your sandwich cold.
If you want it warm and the cheese a bit melty, add sandwich to a panini press or grill pan and press down and cook over medium heat until just warmed through.
Note: If using girl pan lay a heavy pan on top of sandwich 3-4 minutes, flip and grill other side with pan on top.