Preheat your oven to 375°F.
Slice the zucchini lengthwise into thin strips to serve as lasagna layers. Lay out the slices on a paper towel, lightly sprinkle with salt, and let them drain excess moisture.
In a non-stick pan, sauté minced garlic in a small amount of water or a cooking spray over medium heat until fragrant, about 1 minute.
Add the lean ground beef to the pan and cook until just browned, breaking it up as it cooks. Season with salt, pepper, and Italian seasoning.
Stir in the tomato sauce with the cooked beef and let it simmer for a couple of minutes to blend the flavors.
In a small baking dish, layer zucchini slices on the bottom. Spoon half of the beef and tomato sauce mixture over the zucchini, then dollop half of the ricotta cheese evenly, and sprinkle a little mozzarella on top.
Repeat the layers with the remaining zucchini slices, beef mixture, ricotta, and finish with the remaining mozzarella.
Place the dish in the preheated oven and bake for 20-25 minutes, until the cheese is melted and bubbly and the zucchini is tender.
Remove from the oven and allow to cool slightly before serving.