You can definitely turn this sandwich into a delicious turkey pesto panini. Fully assemble and set your panini press to medium low heat. Cook for 4-5 minutes until the outsides are lightly toasted golden and the cheese is melted. The time may vary depending on your panini press model. Note: the spinach will be more wilted and the tomato will be warm. You can leave them out and add them afterwards if you prefer.