Slice zucchini. Thaw and drain all water from frozen spinach Cut cauliflower into small florets. Keep in hot boiled water for 2-3 mins, drain away the water and set aside.
Saute sliced Zucchini in olive oil and a small amount of the total salt and set aside.
Sligltly saute spinach and cauliflower.
Beat the egg, add the rest of the salt and stir in all the sauteed vegetables and set aside.
Sauté ground turkey and diced onion in a skillet coated with cooking spray over medium heat until onion is tender. Spread pasta sauce on bottom of an 11- x 7-inch baking dish coated with cooking spray. Layer with vegetable and egg mixture and pasta sauce; Repeat layers once, ending with remaining vegetable mixture. Top with remaining zucchini slices and remaining pasta sauce. Bake at 350° for 15 minutes. Let stand 5 minutes.