Prepare the tortellini according to the cooking instructions, strain, drain well and keep warm.
Wash the zucchini and cut into slices about ½ cm thick. Fry both sides in hot olive oil with chopped garlic, salt and keep warm. Place a can of diced tomatoes in the frying fat, season with salt, pepper and sage and reduce a little.
Arrange the tortellini and zucchini slices on plates, pour the sauce over them, sprinkle with mozzarella cubes and bring to the table.