Preheat your oven to 375°F (190°C).

Slice the zucchinis lengthwise into thin strips using a mandoline or a sharp knife.

In a skillet, heat some olive oil over medium heat and sauté the diced onion and minced garlic until translucent.

Add the ground turkey or beef to the skillet and cook until browned. Season with salt, pepper, and dried oregano.

Stir in the marinara sauce and let it simmer for a few minutes.

In a separate bowl, mix the ricotta cheese with half of the parmesan cheese.

In a baking dish, start layering the lasagna: spread a thin layer of the meat sauce on the bottom, followed by a layer of zucchini slices, a layer of ricotta mixture, and a sprinkle of mozzarella cheese. Repeat the layers until all ingredients are used, finishing with a layer of meat sauce on top.

Cover the baking dish with foil and bake in the preheated oven for about 30 minutes.

Remove the foil and sprinkle the remaining parmesan and mozzarella cheese on top.

Bake for an additional 10-15 minutes, or until the cheese is melted and bubbly.

Let the lasagna rest for a few minutes before serving. Enjoy!