Wash tomatoes and cut off the lid. Core the tomatoes, season with salt and pepper.
Cut the mozzarella into approx. 1 cm cubes, mix with the pesto, pour the mixture into the tomatoes, put the tomato lid back on. Wrap the tomatoes in aluminum foil.
Prepared in this way, bake on the grill for approx. 10 minutes or in the oven at 180 degrees for approx. 10 minutes, ideally tzatziki and baguette bread.