Preheat the Oven: Start by preheating your oven to 375°F (190°C). Lightly grease a medium-sized baking dish with olive oil or non-stick spray.

Prepare the Zucchini: Wash and slice the zucchinis into 1/4-inch thick rounds. Place the sliced zucchinis in a colander and sprinkle lightly with salt. Allow them to rest for approximately 10 minutes to release any extra moisture. Pat dry with a paper towel.

Layer the Zucchini and Sauce: Arrange a layer of zucchini slices in the bottom of the prepared baking dish. Spread a thin layer of marinara sauce over the zucchini, followed by a sprinkle of minced garlic.

Add the Cheese: Sprinkle a generous layer of shredded mozzarella and grated Parmesan cheese over the sauce.

Repeat the Layers: Continue layering zucchini slices, marinara sauce, minced garlic, and cheese until all ingredients are used, finishing with a top layer of mozzarella and Parmesan cheese.

Bake the Casserole: Place the baking dish in the preheated oven and bake for 25-30 minutes, or until the cheese is bubbly and golden brown, and the zucchini is tender.

Serve: Remove the zucchini bake from the oven and let it cool for a few minutes before serving. Enjoy this cheesy, flavorful dish as a side or even as a light vegetarian main course.