Grease a glass casserole dish and preheat the oven to 350F.
Toss the zucchini slices with 1 tbsp olive oil and half of the salt, pepper and garlic.
Layer half of the zucchini slices, half of the tomatoes, then half of the cheese. Repeat until all ingredients are layered.
Bake at 350F until veggies are soft (about 30 minutes).