Preheat your oven to 400°F.
Slice the zucchini lengthwise into thin strips, which will serve as the lasagna ‘noodles’. If desired, lightly salt the slices and let them sit for a few minutes to remove excess water, then pat dry.
In a skillet, heat the olive oil over medium heat. Add the finely chopped onion and minced garlic, cooking until softened and fragrant.
Add the lean ground turkey to the skillet. Cook thoroughly, breaking it up as it cooks. Once browned, season with Italian seasoning, salt, and pepper.
Stir in the tomato sauce and let the mixture simmer for about 5 minutes to merge the flavors.
In a baking dish, layer a few zucchini slices on the bottom. Spread half of the turkey and tomato sauce mixture over the zucchini, then dollop and gently spread a layer of low-fat ricotta cheese.
Repeat layering with remaining zucchini, turkey mixture, and ricotta topping.
Cover the dish with foil and bake in the preheated oven for 20 minutes. Remove the foil and bake for an additional 10 minutes until the top is slightly browned.
Allow the lasagna to cool for a few minutes before serving. Enjoy a nutrient-dense, light lasagna perfect for any meal of the day.