This version uses the slices of zucchini as the 'noodles'. There is no pasta, though I suppose you could add it if you like. These are all approximations. I just throw in what ever looks right. You may want to add more of less of some of the ingredients. For vegetarian, omit the meat.
i like to make a lasagna of sorts using zucchini sliced the long way as the 'noodles'. then i make a spaghetti sauce with lots of veggies like peppers, onions, mushrooms, sauteed in a little olive oil (or use a jar sauce and add the extra veggies).
add cooked ground beef or cooked italian sausage or not- your choice.
cheese layer per 1 jar of spaghetti sauce: about 8 oz grated mozzarella, 8 oz container of cottage cheese,1 egg, ¼ cup parmesan cheese