Preheat the oven to 350°F or 180°C. Bake sliced zucchini for 15-20 minutes.
Meanwhile, in a large skillet sauté onion, garlic, and pepper for 5-7 minutes.
Add ground turkey, crushed tomatoes, tomato sauce, basil, parsley, and season with salt and pepper. Reduce heat to low and simmer uncovered for 20 minutes.
For cheese mixture, combine ricotta, parmesan, and egg. Stir to combine.
To assemble lasagna, firstly, spread one half of turkey meat sauce in a baking dish. Place zucchini slices evenly over the sauce, then spread one half of the cheese mixture, and sprinkle one half of the mozzarella. Repeat the layers.
Cover the baking dish with foil and bake for 30 minutes. Then remove the foil and bake for another 10 minutes.