Cut the turkey breast into thin slices. Also cut the tomatoes and mozzarella into slices. Chop the parsley.
Grease an ovenproof dish with 10 g butter. Place the meat slices on the floor. Layer the mozzarella slices alternately with the tomatoes like a roof tile. Pour salt and pepper over it.
Scatter parmesan and parsley on top, then top with the remaining butter, cut into flakes. Bake in a preheated oven at 225 - 250 ° C for 15 - 20 minutes.