Slice the zucchini lengthwise into 1/4-inch strips. Sprinkle lightly with salt and let rest on paper towels for 15 minutes to draw out excess moisture. Pat completely dry with a paper towel.
Preheat your oven to 375°F (190°C) and lightly grease a 9x13-inch baking dish.
Heat the olive oil in a large skillet over medium-high heat. Add the diced yellow onion and minced garlic, sautéing for 3 minutes until softened.
Add the ground turkey to the skillet. Cook until fully browned, breaking it apart with a spatula. Drain any excess fat.
Stir in the crushed tomatoes, Italian seasoning, 1 tsp salt, and black pepper. Bring to a gentle simmer, then reduce the heat and cook for 10 minutes.
In a medium bowl, mix together the ricotta cheese, egg, and 1/4 cup of the Parmesan cheese.
Spread a thin layer of the turkey meat sauce at the bottom of the baking dish. Arrange a layer of dried zucchini slices over the sauce. Spread a portion of the ricotta mixture on top, then sprinkle with a portion of the mozzarella cheese.
Repeat the layers 2-3 times until all ingredients are used, finishing with a generous layer of mozzarella and the remaining 1/4 cup of Parmesan cheese on top.
Cover the dish loosely with aluminum foil and bake for 30 minutes.
Remove the foil and bake for an additional 15 minutes, or until the cheese is bubbly and golden brown.
Let the dish rest for at least 10 minutes before slicing and serving to ensure the layers hold together.