Step 1: Prepare the Zucchini : Slice zucchini lengthwise into thin strips using a mandoline or vegetable peeler (about ⅛ inch thick). Lay slices on paper towels and sprinkle with salt. Let sit for 10–15 minutes to draw out moisture. Pat them dry with another paper towel to remove excess water. (Tip: This helps prevent the lasagna from becoming watery.)

Step 2: Make the Meat Sauce : In a skillet, heat olive oil over medium heat. Add onion and sauté for 2–3 minutes until soft. Add garlic and cook for 30 seconds until fragrant. Stir in ground beef or turkey and cook until browned. Drain excess fat. Add marinara sauce, Italian seasoning, salt, and pepper. Simmer for 10 minutes (Skip the meat if making a vegetarian version — just use marinara sauce with sautéed veggies like mushrooms or spinach.)

Step 3: Prepare the Ricotta Mixture : In a mixing bowl, combine ricotta cheese, egg, Parmesan, parsley, salt, and pepper. Stir until smooth and creamy.

Step 4: Assemble the Lasagna : Preheat oven to 375°F (190°C). Spread a thin layer of sauce on the bottom of a 9x13-inch baking dish. Add a layer of zucchini slices, slightly overlapping them. Spread a layer of the ricotta mixture over the zucchini. Add a layer of meat sauce. Sprinkle a small handful of mozzarella on top. Repeat layers (zucchini → ricotta → sauce → mozzarella) until ingredients are used up. Finish with a final layer of mozzarella and a sprinkle of Parmesan.

Step 5: Bake : Cover with foil and bake for 30 minutes. Remove foil and bake an additional 10–15 minutes, until the cheese is golden and bubbly. Let the lasagna rest for 10 minutes before slicing (This helps it set and makes serving easier.)