Preheat the oven to 400F. Slice zucchini in half on length, and scoop the inside out with a spoon.
Place them in a baking dish, cut side up and spray with cooking spray.
Season to taste with salt and pepper then bake for 10-12 minutes until the zucchini softens a bit.
Heat 1 tablespoon olive oil in a skillet over medium-high heat. Add ground turkey, Italian seasoning, garlic, and cook stirring occasionally and breaking up the meat with a wooden spoon.
Once the meat is golden brown and cooked through, stir in the marinara sauce and simmer for 1-2 minutes more. Set aside.
Meanwhile, in a mixing bowl, combine ricotta cheese, egg, parsley, mozzarella and half of the parmesan cheese. Mix well to combine.
Stuff the zucchini boats with this cheese mixture, top with the meat sauce and sprinkle with remaining parmesan cheese.
Cover baking dishes with foil and bake in preheated oven for about 25-30 minutes.
Garnish with fresh chopped parsley and enjoy