Layers of baked zucchini, with tomato sauce, Parmesan and Mozzarella cheeses.
If using the 9x13 pan this shield about 16 square slices.
I have never bought jarred sauce so i dont know how many ounces there would be - when making this dish I use about 64 ozs of homemade basic tomato sauce. Which is about 8 cups. You probably wont need that much but I like to have extra just in case.