Cook zucchini in a 400˚F oven for 10-15 minutes to soften.
Fry the ground beef, sausage, and onion till brown. Add 1 cup pasta sauce, diced tomatoes, and Italian seasoning. Heat through.
In a medium bowl, mix together the beaten eggs with the cottage cheese. Add the spinach and parmesan cheese and nutmeg.
Pour ½ cup pasta sauce on the bottom of a 9 x 13" pan. First layer the zucchini, meat sauce, layer of zucchini, cottage cheese mixture, zucchini, final layer of meat sauce and a final layer of zucchini. Top with remaining ½ cup pasta sauce.
Bake uncovered in a 350˚F oven for 1 hour. Cover with mozzarella cheese and continue to bake until cheese is brown and bubbly.