Wash the zucchini and tomatoes. Slice the zucchini into rounds and place them in a bowl.
Sprinkle salt, pepper and a little bit of garlic powder over them and mix gently to coat the vegetables. Set aside.
Repeat the step with the sliced tomatoes.
Butter an 8x8-inch baking dish and arrange the zucchini slices in the dish, alternating with slices of mozzarella cheese and tomato, so that the slices overlap each other in a neat row pattern.
Bake in the oven for about 20 minutes.
Remove and add the crushed garlic and the shredded cheddar cheese. Bake for another 5 minutes or until the cheese melts.